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: Senthilvadivu Guruswamy <svadivu@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
index b3fa3a7..aa4f7a5 100644
--- a/drivers/video/omap2/dss/dsi.c
+++ b/drivers/video/omap2/dss/dsi.c
@@ -3274,7 +3274,6 @@
 
 	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;