ath79: TP-Link EAP225-Wall v1: convert radios to nvmem-cells

ath79: TP-Link EAP225-Wall v1: convert radios to nvmem-cells

Replace the mtd-cal-data phandle by an nvmem-cell reference to the art
partition for the 2.4GHz ath9k radio.

Add the PCIe node for the ath10k radio to the devicetree, and refer to
the art partition for the calibration data using nvmem-cells.

Use mac-address-increment to ensure the MAC address is set correctly,
and remove the device from the caldata extraction and patching script.

Signed-off-by: Sander Vanheule <sander@svanheule.net>