mtd: mxc_nand: Remove duplicate NAND_CMD_RESET case value

This reverts commit 6680376 ("mtd: mxc_nand: add RESET command support").
Support for NAND_CMD_RESET was added separately in commit d484018
("mtd: mxc_nand: set NFC registers after reset"), causing a build error:

drivers/mtd/nand/mxc_nand.c: In function 'mxc_nand_command':
drivers/mtd/nand/mxc_nand.c:689: error: duplicate case value
drivers/mtd/nand/mxc_nand.c:606: error: previously used here

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/nand/mxc_nand.c

@@ -686,7 +686,6 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
 
 	case NAND_CMD_ERASE1:
 	case NAND_CMD_ERASE2:
-	case NAND_CMD_RESET:
 		send_cmd(host, command, false);
 		mxc_do_addr_cycle(mtd, column, page_addr);