ARM: S3C: Fix NAND device registration by s3c_nand_set_platdata().

Fix two bugs in s3c_nand_set_platdata() where thet device's platform
data was not set, and the wrong error check was being performed on
the return of s3c_nand_copy_set().

Fixes the following OOPS:

Unable to handle kernel NULL pointer dereference at virtual address 00000004
PC is at s3c24xx_nand_probe+0x234/0x594

Signed-off-by: Ben Dooks <ben-linux@fluff.org>

arch/arm/plat-s3c/dev-nand.c

@@ -114,14 +114,16 @@ void __init s3c_nand_set_platdata(struct s3c2410_platform_nand *nand)
 
 		for (i = 0; i < npd->nr_sets; i++) {
 			ret = s3c_nand_copy_set(to);
-			if (!ret) {
+			if (ret) {
 				printk(KERN_ERR "%s: failed to copy set %d\n",
 				__func__, i);
 				return;
 			}
 			to++;
 		}
 	}
+
+	s3c_device_nand.dev.platform_data = npd;
 }
 
 EXPORT_SYMBOL_GPL(s3c_nand_set_platdata);