clk: msm: update the fractional divider array for DSI PCLK

1:1 is the MN divider preference for DSI PCLK for the regular
24 bpp use-case for display as per hardware recommendation.
Update the divider array to give first priority to 1:1
divider combination.

Change-Id: Id4a60093bd88b2cdf8066ae5209cd279d060ea54
Signed-off-by: Padmanabhan Komanduru <pkomandu@codeaurora.org>