clk: msm: Add reset controller support

A reset signal is associated with each clock branch but sometimes a reset
signal is associated with a handful of clocks. Either way the register
interface is the same; set a bit to assert a reset and clear a bit to
deassert a reset. Add support for these types of resets signals.

Change-Id: Ic9d00c0a03507a55ca6c96f977a6ddf55b4b5db7
Signed-off-by: Taniya Das <tdas@codeaurora.org>