target: msm8916: add support to send the i2c commands

To communicate to the DSI2HDMI bridge chip i2c commands
are required. These i2c commands are required to set up
the bridge chip and to communicate the incoming data's
mode and timing parameters.

This change enables the support for the same.

Change-Id: I2dfe54c0d902547c5dc48d3ea2e610de2ce3285e
diff --git a/dev/gcdb/display/gcdb_display.h b/dev/gcdb/display/gcdb_display.h
index 0d6f06f..0ff36fc 100755
--- a/dev/gcdb/display/gcdb_display.h
+++ b/dev/gcdb/display/gcdb_display.h
@@ -52,6 +52,7 @@
 int target_panel_reset(uint8_t enable, struct panel_reset_sequence *resetseq,
 						struct msm_panel_info *pinfo);
 int target_ldo_ctrl(uint8_t enable, struct msm_panel_info *pinfo);
+int target_display_dsi2hdmi_config(struct msm_panel_info *pinfo);
 
 int gcdb_display_init(const char *panel_name, uint32_t rev, void *base);
 int gcdb_display_cmdline_arg(char *panel_name, char *pbuf, uint16_t buf_size);