rtw89: ser: control hci interrupts on/off by state

While SER (system error recover) is processing, it's supposed to mean
something is under recovery. So, disable interrupts (excluding the one
of halt which could be used during SER) to avoid unexpected behavior.
And then, enable interrupts after SER is done.

Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220314071250.40292-5-pkshih@realtek.com