UPSTREAM: wifi: mt76: mt7925: add mt7925_mac_link_sta_add to create per-link STA

The mt7925_mac_link_sta_add function currently adds the per-link STA.
We will extend this function when we implement the MLO functionality.

This patch only includes structural changes and does not involve any
logic changes.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Link: https://patch.msgid.link/20240613030241.5771-43-sean.wang@kernel.org


Signed-off-by: Felix Fietkau <nbd@nbd.name>
(cherry picked from commit 50298715
 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

 master)

BUG=b:366169724
TEST=Verify on nissa by AVL test wifi_matfunc

Change-Id: I9f34966bd174cdb6b30121846f792823e7dc4cfe
Signed-off-by: Sean Wang <objelf@gmail.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/5737170


Reviewed-by: Sean Paul <sean@poorly.run>
Commit-Queue: Jintao Lin <jintaolin@chromium.org>
Tested-by: Jintao Lin <jintaolin@chromium.org>
Reviewed-by: Jintao Lin <jintaolin@chromium.org>
Signed-off-by: Mateusz Urbańczyk <urbanczyk@google.com>