msm: sde: fix to handle invalid format in sde rotator

Fix to handle any invalid format in sde rotator driver
by returning NULL for any unsupported format.

Change-Id: I2ee058b2dafb9d03b4a939f39d15c2714dbc6053
Signed-off-by: Harsh Sahu <hsahu@codeaurora.org>
1 file changed