ARM: EXYNOS: Remove a new bus_type instance for EXYNOS5

A seperate bus_type instance is not required for EXYNOS5. The
existing bus_type instance used with EXYNOS4 is sufficient for
both EXYNOS4 and EXYNOS5. This also solves issue of uninitialized
usage of exynos4_subsys in EXYNOS4 power management code that is
reused for EXYNOS5 also. In addition to that, the existing
exynos4_subsys bus_type is renamed to exynos_subsys to indicate
that it is reused on both EXYNOS4 and EXYNOS5 platforms.

Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
diff --git a/arch/arm/mach-exynos/pm.c b/arch/arm/mach-exynos/pm.c
index 428cfeb..7164aa9 100644
--- a/arch/arm/mach-exynos/pm.c
+++ b/arch/arm/mach-exynos/pm.c
@@ -275,7 +275,7 @@
 
 static struct subsys_interface exynos4_pm_interface = {
 	.name		= "exynos4_pm",
-	.subsys		= &exynos4_subsys,
+	.subsys		= &exynos_subsys,
 	.add_dev	= exynos4_pm_add,
 };