Description: mt76: mt7921: fix possible AOOB issue in mt7921_mcu_tx_rate_report
References:
Notes:
 carnil> Introduced in 1c099ab44727c ("mt76: mt7921: add MCU support"). Vulnerable
 carnil> versions: 5.12-rc1.
Bugs:
upstream: released (5.13-rc5) [d874e6c06952382897d35bf4094193cd44ae91bd]
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"