arm64: Add support for TI's K3 Multicore SoC architecture

Add support for Texas Instrument's K3 Multicore SoC architecture
processors.

Reviewed-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm64/Kconfig.platforms

@@ -71,6 +71,13 @@ config ARCH_EXYNOS
 	help
 	  This enables support for ARMv8 based Samsung Exynos SoC family.
 
+config ARCH_K3
+	bool "Texas Instruments Inc. K3 multicore SoC architecture"
+	select PM_GENERIC_DOMAINS if PM
+	help
+	  This enables support for Texas Instruments' K3 multicore SoC
+	  architecture.
+
 config ARCH_LAYERSCAPE
 	bool "ARMv8 based Freescale Layerscape SoC family"
 	select EDAC_SUPPORT