Description: mt76: mt7921: fix kernel crash when the firmware fails to download
References:
Notes:
 carnil> Introduced in 5c14a5f944b9 ("mt76: mt7921: introduce mt7921e support").
 carnil> Vulnerable versions: 5.12-rc1.
Bugs:
upstream: released (5.13-rc1) [e230f0c44f011f3270680a506b19b7e84c5e8923]
6.7-upstream-stable: N/A "Fixed before branching point"
6.6-upstream-stable: N/A "Fixed before branching point"
6.1-upstream-stable: N/A "Fixed before branching point"
5.10-upstream-stable: N/A "Vulnerable code not present"
4.19-upstream-stable: N/A "Vulnerable code not present"
sid: N/A "Vulnerable code not present"
6.1-bookworm-security: N/A "Fixed before branching point"
5.10-bullseye-security: N/A "Vulnerable code not present"
4.19-buster-security: N/A "Vulnerable code not present"