drm/mediatek: crtc: Make config-updating atomic

While updating config, the irq would occur and get the partial
config, so use variable config_updating to make updating atomic.

Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
This commit is contained in:
Chun-Kuang Hu 2021-03-13 17:22:17 +08:00
commit 368166ec76