soc: renesas: Kconfig: Introduce ARCH_RZG2L config option

The Renesas RZ/G2L, RZ/G2LC, RZ/G2UL and RZ/V2L SoCs have identical IP
blocks for which drivers are common.  To avoid updating the Kconfig
files for drivers in common to each SoC, introduce the ARCH_RZG2L config
option.
The ARCH_RZG2L config option will be selected by the above mentioned
SoCs, and the ARCH_RZG2L config option will be used as a dependency for
the drivers in common.

While at it, move PM and PM_GENERIC_DOMAINS under the ARCH_RZG2L config
option instead of keeping it for individual SoCs.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20220224092114.25737-1-prabhakar.mahadev-lad.rj@bp.renesas.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

drivers/soc/renesas/Kconfig

@@ -40,6 +40,11 @@ config ARCH_RMOBILE
 	select SYS_SUPPORTS_SH_TMU
 	select SYSC_RMOBILE
 
+config ARCH_RZG2L
+	bool
+	select PM
+	select PM_GENERIC_DOMAINS
+
 config ARCH_RZN1
 	bool
 	select ARM_AMBA
@@ -293,15 +298,13 @@ config ARCH_R8A774B1
 
 config ARCH_R9A07G044
 	bool "ARM64 Platform support for RZ/G2L"
-	select PM
-	select PM_GENERIC_DOMAINS
+	select ARCH_RZG2L
 	help
 	  This enables support for the Renesas RZ/G2L SoC variants.
 
 config ARCH_R9A07G054
 	bool "ARM64 Platform support for RZ/V2L"
-	select PM
-	select PM_GENERIC_DOMAINS
+	select ARCH_RZG2L
 	help
 	  This enables support for the Renesas RZ/V2L SoC variants.