ARM: dts: Drop custom hwmod property for am4 i2c

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.

Cc: Keerthy <j-keerthy@ti.com>
Tested-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/am437x-l4.dtsi

@@ -193,7 +193,6 @@ uart0: serial@0 {
 
 		target-module@b000 {			/* 0x44e0b000, ap 18 48.0 */
 			compatible = "ti,sysc-omap2", "ti,sysc";
-			ti,hwmods = "i2c1";
 			reg = <0xb000 0x8>,
 			      <0xb010 0x8>,
 			      <0xb090 0x8>;
@@ -733,7 +732,6 @@ uart2: serial@0 {
 
 		target-module@2a000 {			/* 0x4802a000, ap 12 22.0 */
 			compatible = "ti,sysc-omap2", "ti,sysc";
-			ti,hwmods = "i2c2";
 			reg = <0x2a000 0x8>,
 			      <0x2a010 0x8>,
 			      <0x2a090 0x8>;
@@ -1256,7 +1254,6 @@ target-module@8e000 {			/* 0x4818e000, ap 36 02.0 */
 
 		target-module@9c000 {			/* 0x4819c000, ap 38 52.0 */
 			compatible = "ti,sysc-omap2", "ti,sysc";
-			ti,hwmods = "i2c3";
 			reg = <0x9c000 0x8>,
 			      <0x9c010 0x8>,
 			      <0x9c090 0x8>;