drm/msm/sde: update DS and DSPP HW request based on display type

SDE drm driver does not request DSPP for any DSI display
and requests DS for all DSI displays. It expects client to
override this configuration if needed. This may lead to
failure if client miss to update the HW request. Failure
is due to either enough DS HW blocks unavailable or LM
allocation without DSPP. This can be avoided by setting
DS requirement only for primary display and DSPP
requirement for primary and secondary DSI displays by
default.

Change-Id: I6a162b8005716a2a77f0c294c785f2c5bc7c9582
Signed-off-by: Ajay Singh Parmar <aparmar@codeaurora.org>
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>