clk: msm: clock-local2: Enable sources before force turning on RCG

Make sure that the RCG parents are turned on before force enabling
it and changing it's configuration.

CRs-Fixed: 1020896
Change-Id: Ia633c4dcbab62fc6a4407c5896e36a7bbef48579
Signed-off-by: Deepak Katragadda <dkatraga@codeaurora.org>