drm/amd/display: remove minimum Dispclk and apply oem panel timing.

[why & how]
1. apply oem panel timing (not only on OLED)
2. remove MIN_DPP_DISP_CLK request in driver.

This fix will apply for dcn31x but not
sync with DML's output.

Reviewed-by: Ovidiu Bunea <ovidiu.bunea@amd.com>
Signed-off-by: Charlene Liu <Charlene.Liu@amd.com>
Signed-off-by: Tom Chung <chiahsuan.chung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>