Revert "OMAP: DSS2: HDMI: fix hdmi clock name"

This reverts commit df5d3ed2.

The HDMI clock name has been fixed in HWMOD data.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

drivers/video/omap2/dss/hdmi.c

@@ -1704,9 +1704,9 @@ static int hdmi_get_clocks(struct platform_device *pdev)
 
 	hdmi.sys_clk = clk;
 
-	clk = clk_get(&pdev->dev, "dss_48mhz_clk");
+	clk = clk_get(&pdev->dev, "fck");
 	if (IS_ERR(clk)) {
-		DSSERR("can't get hdmi_clk\n");
+		DSSERR("can't get fck\n");
 		clk_put(hdmi.sys_clk);
 		return PTR_ERR(clk);
 	}