disp: msm: sde: avoid rsvp_nxt allocation for suspend commit

During suspend commit, crtc_commit thread is blocked waiting
for touch response in drm_panel_notifier_call_chain and
rsvp_nxt pointer clear in drm_atomic_state_put is pending
(>100ms wait) which was allocated in atomic_check. When
resume commit is triggered early, RM poll timeouts are seen
due to rsvp_nxt pointer is not cleared and thus causing
power on commit failures. This change avoids RM reserve
during atomic_check of suspend commit as msm_crtc_set_mode
returns early and rsvp_nxt is not used elsewhere in commit path.

Change-Id: I4e7bb41d38f5b88ee75f63007dc4403b6b903265
Signed-off-by: Jayaprakash Madisetty <jmadiset@codeaurora.org>