drm/msm/sde: set rotator fetch even if prog fetch is zero

Rotator fetch should be set for panel with zero programmable
fetch required. Remove the check for prog fetch from rotator
fetch so it is set irrespective of prog fetch value.

Change-Id: I44a02bf4c2a0a69b333dfa08561379beab42e712
Signed-off-by: Alan Kwong <akwong@codeaurora.org>