Prior to suspending the system, we need to ensure that certain
clock source and gate registers are unmasked.

while at it, add these clks to save/restore list also.
Signed-off-by: NVikas Sajjan <vikas.sajjan@samsung.com>
Signed-off-by: NAbhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: NTomasz Figa <t.figa@samsung.com>