Revert "wifi: mt76: Check link_conf pointer in mt76_connac_mcu_sta_basic_tlv()"

In mt76_connac_mcu_sta_basic_tlv() link_conf is always not NULL.
Revert the commit '9890624c ("wifi: mt76: Check link_conf pointer in
mt76_connac_mcu_sta_basic_tlv()")' in order to fix the following
warning:

drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c:394 mt76_connac_mcu_sta_basic_tlv()
warn: variable dereferenced before check 'link_conf'

This reverts commit 9890624c.
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20250325-mt76_connac_mcu_sta_basic_tlv-link_conf-revert-v1-1-b84efefb74ee@kernel.org


Signed-off-by: Felix Fietkau <nbd@nbd.name>