ARM: shmobile: Only select PM_RMOBILE for legacy case

Adjust the ARM mach-shmobile Kconfig bits to only
select PM_RMOBILE in case of legacy. This allows us
to enable partial multiplatform support for various
SoCs before Power Domains DT bindings are finalized.

Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
diff --git a/arch/arm/mach-shmobile/Kconfig b/arch/arm/mach-shmobile/Kconfig
index 9295776..42d9de0 100644
--- a/arch/arm/mach-shmobile/Kconfig
+++ b/arch/arm/mach-shmobile/Kconfig
@@ -21,7 +21,7 @@
 
 config ARCH_RMOBILE
 	bool
-	select PM_RMOBILE if PM
+	select PM_RMOBILE if PM && !ARCH_SHMOBILE_MULTI
 	select SYS_SUPPORTS_SH_CMT
 	select SYS_SUPPORTS_SH_TMU