Revert "jewel: increase panel refresh rate to prevent tearing"

This reverts commit 00f5306944dc33607b70bbd5557255b8d352ce17.
display: jewel: evita: kang caf values from orise 720p cmd panel.

drop clk_rate to 482000000 to compensate for vsync tearing.
increase refx100 to 6400 to help the stutter from the rate drop.

Change-Id: I001cf85f69d19a8bf8cbb75e8bc7509956af6ae7