platform: msm_shared: add hdmi compilation

Enable HDMI transmitter core programming code for msm8996.

Change-Id: If996f24fbec8c4cc48d1d247ee883b2ff16d8fb9
diff --git a/platform/msm_shared/include/mdp5.h b/platform/msm_shared/include/mdp5.h
index b8deb6d..1919a6f 100644
--- a/platform/msm_shared/include/mdp5.h
+++ b/platform/msm_shared/include/mdp5.h
@@ -268,6 +268,7 @@
 int mdss_hdmi_on(struct msm_panel_info *pinfo);
 int mdss_hdmi_config(struct msm_panel_info *pinfo, struct fbcon_config *fb);
 void mdss_hdmi_get_vic(char *buf);
+void hdmi_phy_init(void);
 int msm_display_off();
 void display_shutdown(void);