arm64: dts: ti: k3-am62: Enable EPWM nodes at the board level

EPWM nodes defined in the top-level AM62x SoC dtsi files are incomplete
and will not be functional unless they are extended with pinmux
information.

As the pinmux is only known at the board integration level, these
nodes should only be enabled when provided with this information.

Disable the EPWM nodes in the dtsi files and only enable the ones that
are actually pinned out on a given board.
Signed-off-by: Andrew Davis <afd@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Bryan Brattlof <bb@ti.com>
Link: https://lore.kernel.org/r/20221018211533.21335-5-afd@ti.com

arch/arm64/boot/dts/ti/k3-am62-main.dtsi

@@ -612,6 +612,7 @@ epwm0: pwm@23000000 {
 		power-domains = <&k3_pds 86 TI_SCI_PD_EXCLUSIVE>;
 		clocks = <&epwm_tbclk 0>, <&k3_clks 86 0>;
 		clock-names = "tbclk", "fck";
+		status = "disabled";
 	};
 
 	epwm1: pwm@23010000 {
@@ -621,6 +622,7 @@ epwm1: pwm@23010000 {
 		power-domains = <&k3_pds 87 TI_SCI_PD_EXCLUSIVE>;
 		clocks = <&epwm_tbclk 1>, <&k3_clks 87 0>;
 		clock-names = "tbclk", "fck";
+		status = "disabled";
 	};
 
 	epwm2: pwm@23020000 {
@@ -630,5 +632,6 @@ epwm2: pwm@23020000 {
 		power-domains = <&k3_pds 88 TI_SCI_PD_EXCLUSIVE>;
 		clocks = <&epwm_tbclk 2>, <&k3_clks 88 0>;
 		clock-names = "tbclk", "fck";
+		status = "disabled";
 	};
 };

arch/arm64/boot/dts/ti/k3-am625-sk.dts

@@ -465,15 +465,3 @@ &ecap2 {
 &main_mcan0 {
 	status = "disabled";
 };
-
-&epwm0 {
-	status = "disabled";
-};
-
-&epwm1 {
-	status = "disabled";
-};
-
-&epwm2 {
-	status = "disabled";
-};