ARM: dts: Drop legacy custom hwmods property for dra7 gpio

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

We have already added the related device tree data earlier, and have
already dropped the platform data. But we have been still dynamically
allocating the platform data based on "ti,hwmods" property. With recent
ti-sysc driver changes this is no longer needed.
Signed-off-by: NTony Lindgren <tony@atomide.com>

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

@@ -1262,7 +1262,6 @@
 
 		gpio7_target: target-module@51000 {		/* 0x48051000, ap 45 2e.0 */
 			compatible = "ti,sysc-omap2", "ti,sysc";
-			ti,hwmods = "gpio7";
 			reg = <0x51000 0x4>,
 			      <0x51010 0x4>,
 			      <0x51114 0x4>;
@@ -1296,7 +1295,6 @@
 
 		target-module@53000 {			/* 0x48053000, ap 35 36.0 */
 			compatible = "ti,sysc-omap2", "ti,sysc";
-			ti,hwmods = "gpio8";
 			reg = <0x53000 0x4>,
 			      <0x53010 0x4>,
 			      <0x53114 0x4>;
@@ -1330,7 +1328,6 @@
 
 		target-module@55000 {			/* 0x48055000, ap 13 0e.0 */
 			compatible = "ti,sysc-omap2", "ti,sysc";
-			ti,hwmods = "gpio2";
 			reg = <0x55000 0x4>,
 			      <0x55010 0x4>,
 			      <0x55114 0x4>;
@@ -1364,7 +1361,6 @@
 
 		target-module@57000 {			/* 0x48057000, ap 15 06.0 */
 			compatible = "ti,sysc-omap2", "ti,sysc";
-			ti,hwmods = "gpio3";
 			reg = <0x57000 0x4>,
 			      <0x57010 0x4>,
 			      <0x57114 0x4>;
@@ -1398,7 +1394,6 @@
 
 		target-module@59000 {			/* 0x48059000, ap 17 16.0 */
 			compatible = "ti,sysc-omap2", "ti,sysc";
-			ti,hwmods = "gpio4";
 			reg = <0x59000 0x4>,
 			      <0x59010 0x4>,
 			      <0x59114 0x4>;
@@ -1432,7 +1427,6 @@
 
 		target-module@5b000 {			/* 0x4805b000, ap 19 1e.0 */
 			compatible = "ti,sysc-omap2", "ti,sysc";
-			ti,hwmods = "gpio5";
 			reg = <0x5b000 0x4>,
 			      <0x5b010 0x4>,
 			      <0x5b114 0x4>;
@@ -1466,7 +1460,6 @@
 
 		target-module@5d000 {			/* 0x4805d000, ap 21 26.0 */
 			compatible = "ti,sysc-omap2", "ti,sysc";
-			ti,hwmods = "gpio6";
 			reg = <0x5d000 0x4>,
 			      <0x5d010 0x4>,
 			      <0x5d114 0x4>;
@@ -4281,7 +4274,6 @@
 
 		target-module@0 {			/* 0x4ae10000, ap 5 20.0 */
 			compatible = "ti,sysc-omap2", "ti,sysc";
-			ti,hwmods = "gpio1";
 			reg = <0x0 0x4>,
 			      <0x10 0x4>,
 			      <0x114 0x4>;