Revert "drm/amd/display: Use HW lock mgr for PSR1"

This reverts commit
2a69ae1e ("drm/amd/display: Use HW lock mgr for PSR1")

Because it may cause system hang while connect with two edp panel.

Acked-by: Wayne Lin <wayne.lin@amd.com>
Signed-off-by: Tom Chung <chiahsuan.chung@amd.com>