ramips: add RP-N53 pcie wireless eeprom

Fix the PCIe 5GHz wireless by using the on flash eeprom/caldata.
Disable the 2.4GHz band as this band has no antennas attached but is
enabled in the eeprom/caldata.

Fixes: FS#691

Signed-off-by: Mathias Kresin <dev@kresin.me>