mtd: nand: add NAND_CMD_PARAM (0xec) definition

This command is used to read the device ONFI parameters page.
Signed-off-by: Florian Fainelli <ffainelli@freebox.fr>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

include/linux/mtd/nand.h

@@ -88,6 +88,7 @@ extern int nand_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len);
 #define NAND_CMD_RNDIN		0x85
 #define NAND_CMD_READID		0x90
 #define NAND_CMD_ERASE2		0xd0
+#define NAND_CMD_PARAM		0xec
 #define NAND_CMD_RESET		0xff
 
 #define NAND_CMD_LOCK		0x2a