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

Add a CONFIG_PM_RCAR entry and enable it for R-Car
Generation 1 or 2 in case CONFIG_PM or CONFIG_SMP
is set. Consolidate 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 73d6d3d..cd13021 100644
--- a/arch/arm/mach-shmobile/Kconfig
+++ b/arch/arm/mach-shmobile/Kconfig
@@ -1,13 +1,18 @@
 config ARCH_SHMOBILE
 	bool
 
+config PM_RCAR
+	bool
+
 config ARCH_RCAR_GEN1
 	bool
+	select PM_RCAR if PM || SMP
 	select RENESAS_INTC_IRQPIN
 	select SYS_SUPPORTS_SH_TMU
 
 config ARCH_RCAR_GEN2
 	bool
+	select PM_RCAR if PM || SMP
 	select RENESAS_IRQC
 	select SYS_SUPPORTS_SH_CMT