MLK-20781-2 video: dsi_northwest: Change the DSI PHY clock settings

MLK-20781-2 video: dsi_northwest: Change the DSI PHY clock settings

The previous driver uses a hard coded value which generates the DSI
PHY clock can fit HX8363 WVGA screen. But when switching to new WXGA
screen which needs higher pixclock and higher DSI PHY clock, the
hard coded parameters can't work.
Change to follow kernel codes to find the best value of CM, CN, CO
parameters for DSI PHY clock to meet pixclock requirement.

Signed-off-by: Ye Li <ye.li@nxp.com>
(cherry picked from commit d84ddab71eda66b22c702c7d358a53a22b9ac662)
(cherry picked from commit 9fcb1cbae58042e75cd427c9c290a6830a9feff1)