rockchip-rk3588: edge: improve display modes support

[amazingfate]

Description

Last time when I update hdmi driver patches, I drooped this commit from collabora because it will break the system. Now I add it back with other necessary patches. Now hdmi should support more display modes.

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Please also note any relevant details for your test configuration.

• ./compile.sh kernel BOARD=rock-5b BRANCH=edge DEB_COMPRESS=xz KERNEL_GIT=shallow
• HDMI works on rock5b. I don't have monitors with resolution like 1440p to test, but this will not break current status.

Checklist:

Please delete options that are not relevant.

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules