disp: pll: update DSI PHY PLL programming for Kona

This change updates the DSI PHY PLL programming for kona target
as per the hardware recommendation.

Change-Id: I706169fb635e72bd0ccd3057107ea749408733d0
Signed-off-by: Satya Rama Aditya Pinapala <psraditya30@codeaurora.org>