disp: msm: sde: increase max number of mixers to 4

Increase the maximum number of mixers per crtc to 4 to
support 4LM use case. This change also increases the number
of data path to 4 to support 4LM in continuous splash handoff.

Change-Id: I4655017dcb405fad69513bebb8fd7f848fc5873d
Signed-off-by: Amine Najahi <anajahi@codeaurora.org>

msm/sde/sde_hw_mdss.h

@@ -37,7 +37,7 @@
 #endif
 
 #define MAX_DSI_DISPLAYS		2
-#define MAX_DATA_PATH_PER_DSIPLAY	2
+#define MAX_DATA_PATH_PER_DSIPLAY	4
 
 enum sde_format_flags {
 	SDE_FORMAT_FLAG_YUV_BIT,