firmware-utils: tplink-safeloader: set EAP235-Wall v1 soft-version

firmware-utils: tplink-safeloader: set EAP235-Wall v1 soft-version

Starting with v3 of the vendor firmware for the TP-Link EAP235-Wall v1,
downgrades to firmware versions below v3 as not allowed.  Since OpenWrt
uses version 0.0.0 as a default, this causes the factory install to fail
on devices with a recent firmware. This failure is associated by the
following message on the device's serial console:

    EAP235/230-Wall forbid fw reverted from 3.x.x to lower version!

Vendor firmware (v3) also uses build and release numbers to compare
images, so identical version numbers are very unlikely to cause issues.
Bump the firmware version to 3.0.0 to ensure users can install OpenWrt
on their devices.

Reported-by: Colton Conor <colton.conor@gmail.com>
Tested-by: Colton Conor <colton.conor@gmail.com>
Signed-off-by: Sander Vanheule <sander@svanheule.net>