mach-omap2: Remove use of deprecated marco, PTR_RET in devices.c

This removes the deprecacted marco, PTR_RET and changes the
functions that use this marco in their return statement to
instead use the non deprecacted function, PTR_ERR_OR_ZERO
for the file devices.c.
Signed-off-by: Nicholas Krause <xerofoify@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/devices.c

@@ -63,7 +63,7 @@ static int __init omap3_l3_init(void)
 
 	WARN(IS_ERR(pdev), "could not build omap_device for %s\n", oh_name);
 
-	return PTR_RET(pdev);
+	return PTR_ERR_OR_ZERO(pdev);
 }
 omap_postcore_initcall(omap3_l3_init);
 
@@ -333,6 +333,6 @@ static int __init omap_gpmc_init(void)
 	pdev = omap_device_build("omap-gpmc", -1, oh, NULL, 0);
 	WARN(IS_ERR(pdev), "could not build omap_device for %s\n", oh_name);
 
-	return PTR_RET(pdev);
+	return PTR_ERR_OR_ZERO(pdev);
 }
 omap_postcore_initcall(omap_gpmc_init);