disp: msm: sde: adjust DSC encoders to support all 4LM topologies

Add support for all 4LM topologies in new DCE encoder framework.
This change also aligns with the new way of checking topology
information.

Change-Id: I5358d60634070bdb26059056db884ad4161c073e
Signed-off-by: Amine Najahi <anajahi@codeaurora.org>

msm/sde/sde_encoder.h

@@ -38,7 +38,7 @@
 #define MAX_PHYS_ENCODERS_PER_VIRTUAL \
 	(MAX_H_TILES_PER_DISPLAY * NUM_PHYS_ENCODER_TYPES)
 
-#define MAX_CHANNELS_PER_ENC 2
+#define MAX_CHANNELS_PER_ENC 4
 
 #define SDE_ENCODER_FRAME_EVENT_DONE			BIT(0)
 #define SDE_ENCODER_FRAME_EVENT_ERROR			BIT(1)