clk: samsung: exynos5420: add more registers to restore list

This patch adds more register offsets to the list for
preserving their values during S2R.

Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>