Revert "drm/amd/display: parse umc_info or vram_info based on ASIC"

This reverts commit 2551b4a3.

This was not the root cause.  Revert.

Link: https://gitlab.freedesktop.org/drm/amd/-/issues/3678


Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: aurabindo.pillai@amd.com
Cc: hamishclaxton@gmail.com