clk: msm: Switch HMSS CPR clock to active-only resources

Use the active-only version of the CXO clock as
the parent of the HMSS CPR RCG, and remove its
vote on CX (CX is guaranteed to be at least SVS2
as long as at least one CPU is awake).

Change-Id: Iba1e75b8d4b4de134d598aa01b7ba3b3f3f040d3
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>