mtd: nand: fix trivial spelling error

Introduced by commit fde85cfd ("mtd: nand: Fix nand_command_lp() for
8bits opcodes") and I didn't have the heart to have Boris rewrite his
pull request just for that. Anyway, there's some value in having stable
commit hashes.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

drivers/mtd/nand/nand_base.c

@@ -746,7 +746,7 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned int command,
 			chip->cmd_ctrl(mtd, column, ctrl);
 			ctrl &= ~NAND_CTRL_CHANGE;
 
-			/* Only ouput a single addr cycle for 8bits opcodes. */
+			/* Only output a single addr cycle for 8bits opcodes. */
 			if (!nand_opcode_8bits(command))
 				chip->cmd_ctrl(mtd, column >> 8, ctrl);
 		}