wifi: rtw89: 8852b: Fix rtw8852b_pwr_{on,off}_func() for USB

wifi: rtw89: 8852b: Fix rtw8852b_pwr_{on,off}_func() for USB

There are a few differences in the power on/off functions between PCIE
and USB. The changes in the power off function in particular are needed
for the RTL8832BU to be able to power on again after it's powered off.

While the RTL8832BU appears to work without the changes in the power on
function, it's probably best to implement them, in case they are needed
in some situations.

Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>
Acked-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/c12da54f-88e6-4b11-8587-36f9cac13bf3@gmail.com