disp: pll: update 14nm PLL settings as per hardware recommendation

Add changes to update 14nm PLL settings as per latest hardware
recommendation.

Change-Id: Ib8729e14d6ce84e2c4c6a9c972d8a067a43f6e25
Signed-off-by: Vishnuvardhan Prodduturi <vproddut@codeaurora.org>
Signed-off-by: Ritesh Kumar <riteshk@codeaurora.org>