clk: qcom: Add support for hardware control branch

These are the branches which have hardware control bit to be able to
enable/disable the branch. They also need to support set rate on them and
before setting any rate, we have to make sure the current parent and the
next parent is prepared & enabled before the RCG is updated. To support
both parents to be prepared/enabled use the flag FORCE_ENABLE_RCGR.

Change-Id: I14abed3827de8cefc31f3deb3c1e589136c32b8d
Signed-off-by: Taniya Das <tdas@codeaurora.org>