MLK-17059 drm/imx: dpu: crtc: Disable plane src stream ids if necessary in atomic...

MLK-17059 drm/imx: dpu: crtc: Disable plane src stream ids if necessary in atomic flush

We've got chance to commit update for one display stream only instead of
always binding two display streams together for commit since the below
commit.  Thus, we should disable plane source stream ids where necessary
only for one CRTC in ->atomic_flush().

Fixes: 7798441bb25e ("MLK-16771 drm/imx: dpu: kms: Change to use a better KMS")
Signed-off-by: Liu Ying <victor.liu@nxp.com>