drm/msm/sde: remove unused inline rot v1 support

SDE DRM driver does not support the inline rotation
v1. 4.19 sde drm driver supports inline rotation v2
and v4l2 rotator API calls are not required anymore.
Remove rot v1 dead code from sde drm driver.

Change-Id: I2b920442dd3725fee2370d2032a01f3dd50499d2
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>