This patch adds support suspend to ram on EXYNOS4 system. As a note since there is a implementation of common PM will be updated later such as sleep.S. [PATCH 1/3] ARM: EXYNOS4: Add PMU Registers for PM [PATCH 2/3] ARM: EXYNOS4: Suspend to RAM Support [PATCH 3/3] ARM: EXYNOS4: Update HRT for supporting PM