msm: clk: qcom: fix pixel clk divider programming during continuous splash

During continuous splash use case fix appropriate get divider
routine and cache pixel clk divider during handoff. This will
prevent subsequent pll lock failures.

Change-Id: I3b80e47c608dfef2c6693b1e7338e7116665b0cb
Signed-off-by: Shashank Babu Chinta Venkata <sbchin@codeaurora.org>