dt-bindings: remove 'interrupt-parent' from bindings

'interrupt-parent' is often documented as part of define bindings, but
it is really outside the scope of a device binding. It's never required
in a given node as it is often inherited from a parent node. Or it can
be implicit if a parent node is an 'interrupt-controller' node. So
remove it from all the binding files.

Cc: Mark Rutland <mark.rutland@arm.com>
Cc: devicetree@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/rtc/brcm,brcmstb-waketimer.txt

@@ -7,8 +7,6 @@ Required properties:
 - compatible     : should contain "brcm,brcmstb-waketimer"
 - reg            : the register start and length for the WKTMR block
 - interrupts     : The TIMER interrupt
-- interrupt-parent: The phandle to the Always-On (AON) Power Management (PM) L2
-                    interrupt controller node
 - clocks	 : The phandle to the UPG fixed clock (27Mhz domain)
 
 Example:

Documentation/devicetree/bindings/rtc/isil,isl12057.txt

@@ -25,9 +25,6 @@ Optional properties:
  - "wakeup-source": mark the chip as a wakeup source, independently of
     the availability of an IRQ line connected to the SoC.
 
- - "interrupt-parent", "interrupts": for passing the interrupt line
-   of the SoC connected to IRQ#2 of the RTC chip.
-
 
 Example isl12057 node without IRQ#2 pin connected (no alarm support):
 

Documentation/devicetree/bindings/rtc/rtc-cmos.txt

@@ -7,7 +7,6 @@ Required properties:
 
 Optional properties:
   - interrupts : should contain interrupt.
-  - interrupt-parent : interrupt source phandle.
   - ctrl-reg : Contains the initial value of the control register also
     called "Register B".
   - freq-reg : Contains the initial value of the frequency register also

Documentation/devicetree/bindings/rtc/rtc-ds1307.txt

@@ -21,7 +21,6 @@ Required properties:
 - reg: I2C bus address of the device
 
 Optional properties:
-- interrupt-parent: phandle for the interrupt controller.
 - interrupts: rtc alarm interrupt.
 - clock-output-names: From common clock binding to override the default output
                       clock name

Documentation/devicetree/bindings/rtc/rtc-m41t80.txt

@@ -16,7 +16,6 @@ Required properties:
 - reg: I2C bus address of the device
 
 Optional properties:
-- interrupt-parent: phandle for the interrupt controller.
 - interrupts: rtc alarm interrupt.
 - clock-output-names: From common clock binding to override the default output
                       clock name

Documentation/devicetree/bindings/rtc/rtc-omap.txt

@@ -11,7 +11,6 @@ Required properties:
 	- "ti,am4372-rtc" - for RTC IP used similar to that on AM437X SoC family.
 - reg: Address range of rtc register set
 - interrupts: rtc timer, alarm interrupts in order
-- interrupt-parent: phandle for the interrupt controller
 
 Optional properties:
 - system-power-controller: whether the rtc is controlling the system power

Documentation/devicetree/bindings/rtc/rtc-palmas.txt

@@ -3,7 +3,6 @@ Palmas RTC controller bindings
 Required properties:
 - compatible:
   - "ti,palmas-rtc" for palma series of the RTC controller
-- interrupt-parent: Parent interrupt device, must be handle of palmas node.
 - interrupts: Interrupt number of RTC submodule on device.
 
 Optional properties:

Documentation/devicetree/bindings/rtc/spear-rtc.txt

@@ -3,8 +3,6 @@
 Required properties:
 - compatible : "st,spear600-rtc"
 - reg : Address range of the rtc registers
-- interrupt-parent: Should be the phandle for the interrupt controller
-  that services interrupts for this device
 - interrupt: Should contain the rtc interrupt number
 
 Example:

Documentation/devicetree/bindings/rtc/sprd,sc27xx-rtc.txt

@@ -3,7 +3,6 @@ Spreadtrum SC27xx Real Time Clock
 Required properties:
 - compatible: should be "sprd,sc2731-rtc".
 - reg: address offset of rtc register.
-- interrupt-parent: phandle for the interrupt controller.
 - interrupts: rtc alarm interrupt.
 
 Example:

Documentation/devicetree/bindings/rtc/st,stm32-rtc.txt

@@ -13,8 +13,6 @@ Required properties:
     It is required on stm32(h7/mp1).
 - clock-names: must be "rtc_ck" and "pclk".
     It is required on stm32(h7/mp1).
-- interrupt-parent: phandle for the interrupt controller.
-    It is required on stm32(f4/f7/h7).
 - interrupts: rtc alarm interrupt. On stm32mp1, a second interrupt is required
   for rtc alarm wakeup interrupt.
 - st,syscfg: phandle/offset/mask triplet. The phandle to pwrcfg used to

Documentation/devicetree/bindings/rtc/stericsson,coh901331.txt

@@ -3,7 +3,6 @@ ST-Ericsson COH 901 331 Real Time Clock
 Required properties:
 - compatible: must be "stericsson,coh901331"
 - reg: address range of rtc register set.
-- interrupt-parent: phandle for the interrupt controller.
 - interrupts: rtc alarm interrupt.
 - clocks: phandle to the rtc clock source