ARM: dts: Drop custom hwmod property for omap4 gpio

We can now probe devices with ti-sysc interconnect driver and dts
data. Let's drop the custom ti,hwmods dts property. We have already
dropped the platform data earlier, but have been still allocating it
dynamically, which is no longer needed.
Tested-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/omap4-l4.dtsi

@@ -1085,7 +1085,6 @@ segment@10000 {					/* 0x4a310000 */
 
 		gpio1_target: target-module@0 {			/* 0x4a310000, ap 5 14.0 */
 			compatible = "ti,sysc-omap2", "ti,sysc";
-			ti,hwmods = "gpio1";
 			reg = <0x0 0x4>,
 			      <0x10 0x4>,
 			      <0x114 0x4>;
@@ -1550,7 +1549,6 @@ target-module@40000 {			/* 0x48040000, ap 13 0a.0 */
 
 		target-module@55000 {			/* 0x48055000, ap 15 0c.0 */
 			compatible = "ti,sysc-omap2", "ti,sysc";
-			ti,hwmods = "gpio2";
 			reg = <0x55000 0x4>,
 			      <0x55010 0x4>,
 			      <0x55114 0x4>;
@@ -1584,7 +1582,6 @@ gpio2: gpio@0 {
 
 		target-module@57000 {			/* 0x48057000, ap 17 16.0 */
 			compatible = "ti,sysc-omap2", "ti,sysc";
-			ti,hwmods = "gpio3";
 			reg = <0x57000 0x4>,
 			      <0x57010 0x4>,
 			      <0x57114 0x4>;
@@ -1618,7 +1615,6 @@ gpio3: gpio@0 {
 
 		target-module@59000 {			/* 0x48059000, ap 19 10.0 */
 			compatible = "ti,sysc-omap2", "ti,sysc";
-			ti,hwmods = "gpio4";
 			reg = <0x59000 0x4>,
 			      <0x59010 0x4>,
 			      <0x59114 0x4>;
@@ -1652,7 +1648,6 @@ gpio4: gpio@0 {
 
 		target-module@5b000 {			/* 0x4805b000, ap 21 12.0 */
 			compatible = "ti,sysc-omap2", "ti,sysc";
-			ti,hwmods = "gpio5";
 			reg = <0x5b000 0x4>,
 			      <0x5b010 0x4>,
 			      <0x5b114 0x4>;
@@ -1686,7 +1681,6 @@ gpio5: gpio@0 {
 
 		target-module@5d000 {			/* 0x4805d000, ap 23 14.0 */
 			compatible = "ti,sysc-omap2", "ti,sysc";
-			ti,hwmods = "gpio6";
 			reg = <0x5d000 0x4>,
 			      <0x5d010 0x4>,
 			      <0x5d114 0x4>;