clk: msm: clock-mmss-8996: Support parent switching for display clocks

The byte and pixel RCG clocks can have multiple parents. Use the new clk
ops which support switching between those parents. Update the frequency
table for those RCGs to list out all possible parents and add the missing
ones to the clock list.

Change-Id: I1d3148993c9813c8294f3f55a01e506198a8f1fd
Signed-off-by: Pushkar Joshi <pushkarj@codeaurora.org>