Add the STAs extended capabilities to the ubus STA information. This
way, external daemons can be made aware of a STAs capabilities.
This field is of an array type and contains 0 or more bytes of a STAs
advertised extended capabilities.
Signed-off-by: David Bauer <mail@david-bauer.net>
(cherry picked from commit 6f787239771044ed7eeaf22301c543b699f25cb4)
180b750c02