ARM: OMAP2+: Drop legacy platform data for dra7 mcspi

With recent ti-sysc driver changes, we can probe most devices with device
tree data only and drop the custom "ti,hwmods" property.

Let's drop the legacy platform data and custom "ti,hwmods" property. We
want to do this in a single patch as the "ti,hwmods" property is used to
allocate platform data dynamically that we no longer want to do.

Cc: Vignesh R <vigneshr@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/dra7-l4.dtsi

@@ -1942,7 +1942,6 @@
 
 		target-module@98000 {			/* 0x48098000, ap 47 08.0 */
 			compatible = "ti,sysc-omap4", "ti,sysc";
-			ti,hwmods = "mcspi1";
 			reg = <0x98000 0x4>,
 			      <0x98010 0x4>;
 			reg-names = "rev", "sysc";
@@ -1982,7 +1981,6 @@
 
 		target-module@9a000 {			/* 0x4809a000, ap 49 10.0 */
 			compatible = "ti,sysc-omap4", "ti,sysc";
-			ti,hwmods = "mcspi2";
 			reg = <0x9a000 0x4>,
 			      <0x9a010 0x4>;
 			reg-names = "rev", "sysc";
@@ -2174,7 +2172,6 @@
 
 		target-module@b8000 {			/* 0x480b8000, ap 67 48.0 */
 			compatible = "ti,sysc-omap4", "ti,sysc";
-			ti,hwmods = "mcspi3";
 			reg = <0xb8000 0x4>,
 			      <0xb8010 0x4>;
 			reg-names = "rev", "sysc";
@@ -2206,7 +2203,6 @@
 
 		target-module@ba000 {			/* 0x480ba000, ap 69 18.0 */
 			compatible = "ti,sysc-omap4", "ti,sysc";
-			ti,hwmods = "mcspi4";
 			reg = <0xba000 0x4>,
 			      <0xba010 0x4>;
 			reg-names = "rev", "sysc";