platform: msm8952: add support for display clocks

Update the 8952 clock header file with display related clock
register offsets. Update 8952 clock driver with the required
display clock structures and register the clocks. Add DSI
clocks, MDP clocks, BUS clocks and GDSC clock enable/disable
APIs for msm8952 target.

Change-Id: I1edccdb137d1ab22093d9a577ee12bfb089e054e
3 files changed