disp: msm: sde: correct num_datapath during PM resume with CWB

In PM resume with CWB concurrency usecase, crtc pointer in
conn->state is NULL since drm_mode_config_reset operation is
performed on pm_resume. This change relies on conn_mask in
new_crtc_state for primary connector retrieval and also adds
get_num_lm_from_mode callback to DSI for LM count retrieval
from dsi panel topology. Existing get_mode_info api cannot
retrieve the topology info because mode->priv_info is NULL.
This occurs as WB encoder is added in the drm encoder_list
before primary encoder, introduced as part of commit d28ebf05f4
("disp: msm: sde: populate WB display encoder list before dsi").

Change-Id: I55358fd88ab778bd81475cf3628be13335de1cb5
Signed-off-by: Jayaprakash Madisetty <jmadiset@codeaurora.org>
Signed-off-by: Samantha Tran <samtran@codeaurora.org>

msm/sde/sde_rm.c

@@ -2152,7 +2152,7 @@ static int _sde_rm_populate_requirements(
 			&rm->topology_tbl[SDE_RM_TOPOLOGY_DUALPIPE_3DMERGE];
 
 		num_lm = sde_crtc_get_num_datapath(crtc_state->crtc,
-				conn_state->connector);
+				conn_state->connector, crtc_state);
 
 		if (num_lm == 1)
 			reqs->topology =