This patch converts MT761{0,2,3} PCIe WiFi calibration data to NVMEM
format for legacy Ralink SoCs (MT7620 and Mt7628). The EEPROM size of
the MT7610 and MT7612 is 0x200. there are only three devices uses
MT7613 NIC, ASUS RT-AC1200 V2, COMFAST CF-WR758AC V2 and Keenetic
KN-1613. The EEPROM size of them is 0x4da8.
Signed-off-by: Shiji Yang <yangshiji66@qq.com>