platform: Add clock related functions to clock header file

Add clock related function declarations to target specific
clock header files. In an effort to avoid compilation warnings.

Change-Id: If8b63a758c8becebcd3df8514b3146f1fe307b38
diff --git a/target/msm8974/target_display.c b/target/msm8974/target_display.c
index fbfaeb8..003201e 100755
--- a/target/msm8974/target_display.c
+++ b/target/msm8974/target_display.c
@@ -306,8 +306,9 @@
 	return NO_ERROR;
 }
 
-static int msm8974_mdss_edp_panel_clock(int enable)
+static int msm8974_mdss_edp_panel_clock(int enable, struct msm_panel_info *pinfo)
 {
+	uint32_t dual_dsi = pinfo->mipi.dual_dsi;
 	if (enable) {
 		mdp_gdsc_ctrl(enable);
 		mdp_clock_init();
@@ -315,7 +316,7 @@
 	} else if (!target_cont_splash_screen()) {
 		/* Add here for continuous splash */
 		edp_clk_disable();
-		mdp_clock_disable();
+		mdp_clock_disable(dual_dsi);
 		mdp_gdsc_ctrl(enable);
 	}