wifi-scripts: change wifi-station's mac option into list

wifi-scripts: change wifi-station's mac option into list

In the past PR[1] to add SAE wifi-station support, a commenter[2] requested
that the mac option be changed into a list. After trying to migrate my old
RADIUS setup I found myself wanting this change as well as it would simplify
my config. This patch does precisely that. Old configs that specify
`option mac ....` still work without any issues.

This change was done for both PSK and SAE. The schema was updated as well.

[1]: https://github.com/openwrt/openwrt/pull/17145
[2]: https://github.com/openwrt/openwrt/pull/17145#issuecomment-2523507953

Signed-off-by: Rany Hany <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/17650
Signed-off-by: Hauke Mehrtens <[email protected]>