UPSTREAM: wifi: mt76: mt7925: add mt7925_mac_link_sta_assoc to associate per-link STA

The mt7925_mac_link_sta_add function currently associates 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/20240613030241.5771-44-sean.wang@kernel.org


Signed-off-by: Felix Fietkau <nbd@nbd.name>
(cherry picked from commit 89397bcc
 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: I14968398b6259cdef303df1ab2af9a24cad11dde
Signed-off-by: Sean Wang <objelf@gmail.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/5737171


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