tplink-safeloader: join EAP225-V3 compatible devices

tplink-safeloader: join EAP225-V3 compatible devices

Since FW v5.0.0, TP-Link has provided unified firmware images for
EAP225-v3 and EAP225-Outdoor-v1 devices. Although there may be hardware
differences, the relevant details for image generation are identical.

More recently, the following devices have also been added to the support
list:
  - EAP225-v3.20
  - EAP225-Outdoor-v3
  - EAP225-v4

The country codes appended the device descriptors were introduced with
FW v5.0.7: "Combined firmware versions for different countries/regions."
The release notes provide no further upgrade instructions, so these
firmware images should be backwards compatible.

Add the new compatible devices, with region codes, to the support list
of the EAP225-V3 board ID. The now redundant EAP225-OUTDOOR-V1 ID will
be dropped later.

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