drm/msm/dsi-staging: skip DCS command tx during recovery

When ESD recovery is underway, then DSI host might be in
a bad state and can not transmit DCS commands. So this
change avoids sending any DCS commands when recovery is
pending.

Change-Id: I85272b6debcca8a2e40a97e1c39d9d8aeb8e31b4
Signed-off-by: Sandeep Panda <spanda@codeaurora.org>