drm/amd/display: Modified AUX_DPHY_RX_CONTROL0

[Description] This is cause by failing to read link caps from driver.

Signed-off-by: Daniel He <daniel.he@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>