OMAP: DSS2: DSI: Remove extra iounmap in error path

iounmap is already done in label err2: so extra iounmap in
the error handling path could be removed.
Signed-off-by: NSenthilvadivu Guruswamy <svadivu@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@nokia.com>

drivers/video/omap2/dss/dsi.c

@@ -3274,7 +3274,6 @@ int dsi_init(struct platform_device *pdev)
 
 	dsi.vdds_dsi_reg = dss_get_vdds_dsi();
 	if (IS_ERR(dsi.vdds_dsi_reg)) {
-		iounmap(dsi.base);
 		DSSERR("can't get VDDS_DSI regulator\n");
 		r = PTR_ERR(dsi.vdds_dsi_reg);
 		goto err2;