ARM: dts: Drop custom hwmod property for am4 mmc

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/am4372.dtsi

@@ -230,7 +230,6 @@ edma_tptc2: tptc@49a00000 {
 
 		target-module@47810000 {
 			compatible = "ti,sysc-omap2", "ti,sysc";
-			ti,hwmods = "mmc3";
 			reg = <0x478102fc 0x4>,
 			      <0x47810110 0x4>,
 			      <0x47810114 0x4>;

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

@@ -1076,7 +1076,6 @@ gpio1: gpio@0 {
 
 		target-module@60000 {			/* 0x48060000, ap 30 14.0 */
 			compatible = "ti,sysc-omap2", "ti,sysc";
-			ti,hwmods = "mmc1";
 			reg = <0x602fc 0x4>,
 			      <0x60110 0x4>,
 			      <0x60114 0x4>;
@@ -1600,7 +1599,6 @@ dcan1: can@0 {
 
 		target-module@d8000 {			/* 0x481d8000, ap 54 5e.0 */
 			compatible = "ti,sysc-omap2", "ti,sysc";
-			ti,hwmods = "mmc2";
 			reg = <0xd82fc 0x4>,
 			      <0xd8110 0x4>,
 			      <0xd8114 0x4>;