Fixes low signal issue for 2.4 GHz for the TP-Link Archer C50 v4.
The first two bytes in the eeprom are the chip id. The working
devices have 0x7628 there, whereas the non-working devices have
0x7600 there. This chip id gets checked by the function
mt7603_check_eeprom() which leads the driver to ignore the
contents of the eeprom partition and load default values from otp.
Signed-off-by: Adrian Schmutzler <email@example.com>
Reviewed-by: Fabian Bläse <firstname.lastname@example.org>