ARM: shmobile: Cleanup pm-rmobile.o build using Kconfig

Add a CONFIG_PM_RMOBILE entry and enable it for R-Mobile
SoCs in case CONFIG_PM is set. Consolidate Makefile power
management objects and get rid of #ifdefs in the C code.

Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
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 cd13021..9295776 100644
--- a/arch/arm/mach-shmobile/Kconfig
+++ b/arch/arm/mach-shmobile/Kconfig
@@ -4,6 +4,9 @@
 config PM_RCAR
 	bool
 
+config PM_RMOBILE
+	bool
+
 config ARCH_RCAR_GEN1
 	bool
 	select PM_RCAR if PM || SMP
@@ -18,6 +21,7 @@
 
 config ARCH_RMOBILE
 	bool
+	select PM_RMOBILE if PM
 	select SYS_SUPPORTS_SH_CMT
 	select SYS_SUPPORTS_SH_TMU