Revert "drm/amdgpu: make sure to init common IP before gmc"

This reverts commit 7b0db849 which is
commit a8671493 upstream.

The patches that this patch depends on were not backported properly
and the patch that caused the regression that this patch set fixed
was reverted in commit 412b8441 ("Revert "PCI/portdrv: Don't disable AER reporting in get_port_device_capability()"").
This isn't necessary and causes a regression so drop it.

Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/2216


Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: Sasha Levin <sashal@kernel.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: <stable@vger.kernel.org>    # 5.10
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>