drm/amd/display: On boot disable domain22 force power on

[Why]
HDCP2 enablement fails when domain22 is set to force
power on

[How]
Disable force power on for domain22 on startup

Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Acked-by: Hersen Wu <hersenxs.wu@amd.com>
Signed-off-by: Daniel Miess <daniel.miess@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>