mac80211: fix QCA9561 PA bias

mac80211: fix QCA9561 PA bias

This patch fixes an invalid TX PA DC bias level on QCA9561, which
results in a very low output power and very low throughput as devices
are further away from the AP (compared to other 2.4GHz APs),
following a suggestion from nbd[1].

This patch has been submitted upstream[2].

[1] https://lore.kernel.org/all/91c58969-c60e-2f41-00ac-737786d435ae@nbd.name
[2] https://lore.kernel.org/linux-wireless/20220417145145.1847-1-hacks+kernel@slashdirt.org/

Signed-off-by: Thibaut VARÈNE <hacks@slashdirt.org>