target: msm8994: Fix compilation warnings in target msm8994

Fix compilation warnings in an effort to enable WERROR.

Change-Id: I01a6880933335529f7d729f63801dbbaacd5034b
diff --git a/target/target_display.c b/target/target_display.c
index 4b07cc8..a16a46e 100644
--- a/target/target_display.c
+++ b/target/target_display.c
@@ -30,6 +30,8 @@
 #include <debug.h>
 #include <platform.h>
 
+#include "include/msm_panel.h"
+
 __WEAK int mdp_lcdc_config(void)
 {
 	return 0;