omap: rx51: Cleanup vdds_sdi supply construction

It is much more cleaner to use REGULATOR_SUPPLY macro and a device name
instead of having a reference to rx51_display_device.dev with #if defined()
guards.
Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>
Acked-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/board-rx51-peripherals.c

@@ -359,17 +359,8 @@ static struct regulator_consumer_supply rx51_vio_supplies[] = {
 	REGULATOR_SUPPLY("DVDD", "2-0019"),
 };
 
-#if defined(CONFIG_FB_OMAP2) || defined(CONFIG_FB_OMAP2_MODULE)
-extern struct platform_device rx51_display_device;
-#endif
-
 static struct regulator_consumer_supply rx51_vaux1_consumers[] = {
-#if defined(CONFIG_FB_OMAP2) || defined(CONFIG_FB_OMAP2_MODULE)
-	{
-		.supply	= "vdds_sdi",
-		.dev	= &rx51_display_device.dev,
-	},
-#endif
+	REGULATOR_SUPPLY("vdds_sdi", "omapdss"),
 };
 
 static struct regulator_init_data rx51_vaux1 = {