CVE-2025-40066 wifi: mt76: mt7996: Check phy before init msta_link in mt7996_mac_sta_add_links()

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7996: Check phy before init mstalink in mt7996macstaaddlinks In order to avoid a possible NULL pointer dereference in mt7996macstainitlink routine, move the phy pointer check before running mt7996macstainitlink in...