drivers/mtd/onenand/samsung.c: Fix GCC 4.6 warning

Fix:
samsung.c: In function 's3c_onenand_check_lock_status':
samsung.c:486:6: warning: variable 'tmp' set but not used
[-Wunused-but-set-variable]

Signed-off-by: Anatolij Gustschin <agust@denx.de>

drivers/mtd/onenand/samsung.c

@@ -483,12 +483,11 @@ static void s3c_onenand_check_lock_status(struct mtd_info *mtd)
 {
 	struct onenand_chip *this = mtd->priv;
 	unsigned int block, end;
-	int tmp;
 
 	end = this->chipsize >> this->erase_shift;
 
 	for (block = 0; block < end; block++) {
-		tmp = s3c_read_cmd(CMD_MAP_01(onenand->mem_addr(block, 0, 0)));
+		s3c_read_cmd(CMD_MAP_01(onenand->mem_addr(block, 0, 0)));
 
 		if (readl(&onenand->reg->int_err_stat) & LOCKED_BLK) {
 			printf("block %d is write-protected!\n", block);