wifi: mac80211: don't use rate mask for offchannel TX either

Like the commit ab9177d8 ("wifi: mac80211: don't use rate mask for
scanning"), ignore incorrect settings to avoid no supported rate warning
reported by syzbot.

The syzbot did bisect and found cause is commit 9df66d5b ("cfg80211:
fix default HE tx bitrate mask in 2G band"), which however corrects
bitmask of HE MCS and recognizes correctly settings of empty legacy rate
plus HE MCS rate instead of returning -EINVAL.

As suggestions [1], follow the change of SCAN TX to consider this case of
offchannel TX as well.

[1] https://lore.kernel.org/linux-wireless/6ab2dc9c3afe753ca6fdcdd1421e7a1f47e87b84.camel@sipsolutions.net/T/#m2ac2a6d2be06a37c9c47a3d8a44b4f647ed4f024



Reported-by:  <syzbot+8dd98a9e98ee28dc484a@syzkaller.appspotmail.com>
Closes: https://lore.kernel.org/linux-wireless/000000000000fdef8706191a3f7b@google.com/


Fixes: 9df66d5b ("cfg80211: fix default HE tx bitrate mask in 2G band")
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20240729074816.20323-1-pkshih@realtek.com


Signed-off-by: Johannes Berg <johannes.berg@intel.com>