dev: gcdb: Fix dual dsi support in GCDB

* Support split display option in GCDB

* Fix broadcast mode support in GCDB

* Fix pixel clock calculation for dual DSI
  case

Change-Id: I9871f88ee5059bf3ef9aff4190ec9053a2664876
diff --git a/dev/gcdb/display/panel_display.h b/dev/gcdb/display/panel_display.h
index e141a0c..1f08326 100755
--- a/dev/gcdb/display/panel_display.h
+++ b/dev/gcdb/display/panel_display.h
@@ -39,6 +39,11 @@
 #define BPP_24 24
 
 #define TIMING_SIZE 48
+
+#define DUAL_DSI_FLAG 0x1
+#define DUAL_PIPE_FLAG 0x2
+#define PIPE_SWAP_FLAG 0x4
+#define SPLIT_DISPLAY_FLAG 0x8
 /*---------------------------------------------------------------------------*/
 /* struct definition                                                         */
 /*---------------------------------------------------------------------------*/