OMAPDSS: HDMI: Add delay to wait for 5V power

TPD12S015A spec says to wait 300us after setting CT_CP_HPD gpio for the
5V power output to reach 90% of the voltage. This patch adds the delay
to the driver.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

drivers/video/omap2/dss/hdmi.c

@@ -492,6 +492,9 @@ static int hdmi_power_on(struct omap_dss_device *dssdev)
 	gpio_set_value(hdmi.ct_cp_hpd_gpio, 1);
 	gpio_set_value(hdmi.ls_oe_gpio, 1);
 
+	/* wait 300us after CT_CP_HPD for the 5V power output to reach 90% */
+	udelay(300);
+
 	r = hdmi_runtime_get();
 	if (r)
 		goto err_runtime_get;