ARM: EXYNOS: Split up exynos5420 SoC specific PMU data

This patch splits up mach-exynos/pmu.c file, and moves exynos5420,
PMU configuration data and functions handing data into exynos5420
SoC specific PMU file mach-exynos/exynos5420-pmu.c.

[tested on Peach-Pi (Exynos5880)]
Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>

arch/arm/mach-exynos/Makefile

@@ -11,7 +11,7 @@ ccflags-$(CONFIG_ARCH_MULTIPLATFORM) += -I$(srctree)/$(src)/include -I$(srctree)
 
 obj-$(CONFIG_ARCH_EXYNOS)	+= exynos.o pmu.o exynos-smc.o firmware.o \
 					exynos3250-pmu.o exynos4-pmu.o \
-					exynos5250-pmu.o
+					exynos5250-pmu.o exynos5420-pmu.o
 
 obj-$(CONFIG_EXYNOS_CPU_SUSPEND) += pm.o sleep.o
 obj-$(CONFIG_PM_SLEEP)		+= suspend.o

arch/arm/mach-exynos/exynos-pmu.h

@@ -37,6 +37,7 @@ extern const struct exynos_pmu_data exynos4210_pmu_data;
 extern const struct exynos_pmu_data exynos4212_pmu_data;
 extern const struct exynos_pmu_data exynos4412_pmu_data;
 extern const struct exynos_pmu_data exynos5250_pmu_data;
+extern const struct exynos_pmu_data exynos5420_pmu_data;
 
 extern void pmu_raw_writel(u32 val, u32 offset);
 extern u32 pmu_raw_readl(u32 offset);