arm: mach-omap2: devices: fix omap3_l3_init() return value

Fix the return value for the successful case.
Signed-off-by: NAaro Koskinen <aaro.koskinen@nokia.com>
Acked-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/devices.c

@@ -65,7 +65,7 @@ static int __init omap3_l3_init(void)
 
 	WARN(IS_ERR(od), "could not build omap_device for %s\n", oh_name);
 
-	return PTR_ERR(od);
+	return IS_ERR(od) ? PTR_ERR(od) : 0;
 }
 postcore_initcall(omap3_l3_init);