mtd: nand: add out label in rfc_from4

This has been forgotten in commit f5bbdacc ("[MTD] NAND Modularize
read function") and nobody compiled the driver.
Signed-off-by: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Joern Engel <joern@wh.fh-wedel.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/mtd/nand/rtc_from4.c

@@ -460,7 +460,7 @@ static int rtc_from4_errstat(struct mtd_info *mtd, struct nand_chip *this,
 			er_stat |= 1 << 1;
 		kfree(buf);
 	}
-
+out:
 	rtn = status;
 	if (er_stat == 0) {	/* if ECC is available   */
 		rtn = (status & ~NAND_STATUS_FAIL);	/*   clear the error bit */