OMAPDSS: SDI: clean up regulator init

Clean up the SDI driver's regulator init to remove the (unused)
omap_dss_device parameter, renaming the function to a more sensible
name, and making the code slightly clearer.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

drivers/video/omap2/dss/sdi.c

@@ -248,13 +248,13 @@ void omapdss_sdi_set_datapairs(struct omap_dss_device *dssdev, int datapairs)
 }
 EXPORT_SYMBOL(omapdss_sdi_set_datapairs);
 
-static int sdi_init_display(struct omap_dss_device *dssdev)
+static int sdi_init_regulator(void)
 {
-	DSSDBG("SDI init\n");
-
-	if (sdi.vdds_sdi_reg == NULL) {
 	struct regulator *vdds_sdi;
 
+	if (sdi.vdds_sdi_reg)
+		return 0;
+
 	vdds_sdi = dss_get_vdds_sdi();
 
 	if (IS_ERR(vdds_sdi)) {
@@ -263,7 +263,6 @@ static int sdi_init_display(struct omap_dss_device *dssdev)
 	}
 
 	sdi.vdds_sdi_reg = vdds_sdi;
-	}
 
 	return 0;
 }
@@ -313,7 +312,7 @@ static int sdi_probe_pdata(struct platform_device *sdidev)
 
 	dss_copy_device_pdata(dssdev, plat_dssdev);
 
-	r = sdi_init_display(dssdev);
+	r = sdi_init_regulator();
 	if (r) {
 		DSSERR("device %s init failed: %d\n", dssdev->name, r);
 		dss_put_device(dssdev);