drm/amd/display: Remove power sequencing check

stable inclusion
from stable-v6.6.5
commit 122af8e0d04f941e662ca2131925b1732394173f
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8N21P

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=122af8e0d04f941e662ca2131925b1732394173f

--------------------------------

[ Upstream commit b0399e22ada096435de3e3e73899aa8bc026820d ]

[Why]
	Some ASICs keep backlight powered on after dpms off
	command has been issued.

[How]
	The check for no edp power sequencing was never going to pass.
	The value is never changed from what it is set by design.

Cc: stable@vger.kernel.org # 6.1+
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2765


Reviewed-by: Swapnil Patel <swapnil.patel@amd.com>
Acked-by: Roman Li <roman.li@amd.com>
Signed-off-by: Agustin Gutierrez <agustin.gutierrez@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>