arm: ti: k3: Resync dts files and bindings with Linux Kernel v5.14

This resyncs the dts files for all of the currently in-tree K3
platforms, along with relevant bindings, with the v5.14 Linux Kernel
release.  Of note are that the main-navss/mcu-navss nodes were renamed
to main_navss / mcu_navss and so the u-boot.dtsi files needed to be
updated to match.

Tested on j721e_evm and am65x_evm.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/dts/k3-am65.dtsi b/arch/arm/dts/k3-am65.dtsi
index d84c0bc..a9fc1af 100644
--- a/arch/arm/dts/k3-am65.dtsi
+++ b/arch/arm/dts/k3-am65.dtsi
@@ -56,7 +56,7 @@
 	};
 
 	pmu: pmu {
-		compatible = "arm,armv8-pmuv3";
+		compatible = "arm,cortex-a53-pmu";
 		/* Recommendation from GIC500 TRM Table A.3 */
 		interrupts = <GIC_PPI 7 IRQ_TYPE_LEVEL_HIGH>;
 	};