dt-bindings: Remove cases of 'allOf' containing a '$ref'

json-schema versions draft7 and earlier have a weird behavior in that
any keywords combined with a '$ref' are ignored (silently). The correct
form was to put a '$ref' under an 'allOf'. This behavior is now changed
in the 2019-09 json-schema spec and '$ref' can be mixed with other
keywords. The json-schema library doesn't yet support this, but the
tooling now does a fixup for this and either way works.

This has been a constant source of review comments, so let's change this
treewide so everyone copies the simpler syntax.

Scripted with ruamel.yaml with some manual fixups. Some minor whitespace
changes from the script.

Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Maxime Ripard <mripard@kernel.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Acked-By: Vinod Koul <vkoul@kernel.org>
Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Wolfram Sang <wsa@the-dreams.de> # for I2C
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> #for-iio
Reviewed-by: Stephen Boyd <sboyd@kernel.org> # clock
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.yaml

@@ -91,18 +91,16 @@ properties:
     description:
       If using padding pages, specifies the stride of consecutive
       redistributors. Must be a multiple of 64kB.
-    allOf:
-      - $ref: /schemas/types.yaml#/definitions/uint64
-      - multipleOf: 0x10000
-        exclusiveMinimum: 0
+    $ref: /schemas/types.yaml#/definitions/uint64
+    multipleOf: 0x10000
+    exclusiveMinimum: 0
 
   "#redistributor-regions":
     description:
       The number of independent contiguous regions occupied by the
       redistributors. Required if more than one such region is present.
-    allOf:
-      - $ref: /schemas/types.yaml#/definitions/uint32
-      - maximum: 4096   # Should be enough?
+    $ref: /schemas/types.yaml#/definitions/uint32
+    maximum: 4096
 
   msi-controller:
     description:
@@ -114,22 +112,20 @@ properties:
       A list of pairs <intid span>, where "intid" is the first SPI of a range
       that can be used an MBI, and "span" the size of that range. Multiple
       ranges can be provided.
-    allOf:
-      - $ref: /schemas/types.yaml#/definitions/uint32-matrix
-      - items:
-          minItems: 2
-          maxItems: 2
+    $ref: /schemas/types.yaml#/definitions/uint32-matrix
+    items:
+      minItems: 2
+      maxItems: 2
 
   mbi-alias:
     description:
       Address property. Base address of an alias of the GICD region containing
       only the {SET,CLR}SPI registers to be used if isolation is required,
       and if supported by the HW.
-    allOf:
-      - $ref: /schemas/types.yaml#/definitions/uint32-array
-      - items:
-          minItems: 1
-          maxItems: 2
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    items:
+      minItems: 1
+      maxItems: 2
 
   ppi-partitions:
     type: object
@@ -188,11 +184,10 @@ patternProperties:
         description:
           (u32, u32) tuple describing the untranslated
           address and size of the pre-ITS window.
-        allOf:
-          - $ref: /schemas/types.yaml#/definitions/uint32-array
-          - items:
-              minItems: 2
-              maxItems: 2
+        $ref: /schemas/types.yaml#/definitions/uint32-array
+        items:
+          minItems: 2
+          maxItems: 2
 
     required:
       - compatible

Documentation/devicetree/bindings/interrupt-controller/loongson,liointc.yaml

@@ -54,11 +54,9 @@ properties:
       and each bit in the cell refers to a children interrupt fron 0 to 31.
       If a CPU interrupt line didn't connected with liointc, then keep it's
       cell with zero.
-    allOf:
-      - $ref: /schemas/types.yaml#/definitions/uint32-array
-      - minItems: 4
-        maxItems: 4
-
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    minItems: 4
+    maxItems: 4
 
 required:
   - compatible