ARM: shmobile: Consolidate Legacy SH_CLK_CPG Kconfig

Consolidate SH_CLK_CPG under ARCH_SHMOBILE_LEGACY so it can
be shared by the legacy ARM mach-shmobile support code.

Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 93efc9a..bd8beae 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -661,6 +661,7 @@
 	select NO_IOPORT_MAP
 	select PINCTRL
 	select PM_GENERIC_DOMAINS if PM
+	select SH_CLK_CPG
 	select SPARSE_IRQ
 	help
 	  Support for Renesas ARM SoC platforms using a non-multiplatform