target: msm8974: Add check for edp function for 8974 target

In the case of msm8974 liquid device, the default
interface type is edp, so setting is edp function
to true only in that case, as dsi is used in all
other msm8974 targets.

Change-Id: I3dd6c12dc90cabd1c8b6320061296f569e295a9d
diff --git a/target/msm8974/init.c b/target/msm8974/init.c
index ca59c72..aef7cb2 100644
--- a/target/msm8974/init.c
+++ b/target/msm8974/init.c
@@ -613,6 +613,20 @@
 	return 0;
 }
 
+uint8_t target_is_edp()
+{
+	switch(board_hardware_id())
+	{
+		case HW_PLATFORM_LIQUID:
+			return 1;
+			break;
+		default:
+			return 0;
+			break;
+	}
+	return 0;
+}
+
 static uint8_t splash_override;
 /* Returns 1 if target supports continuous splash screen. */
 int target_cont_splash_screen()