wifi: rtw89: 8922a: set chip_ops FEM and GPIO to NULL

The chip_ops::fem_setup is to get if a hardware module type contains PA
and LNA that will affect how RF calibrations do. The chip_ops::rfe_gpio
is to set GPIO PIN MUX according to hardware module type too. 8922A
doesn't have these special module types yet, so leave them as NULL.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://msgid.link/20240124033813.12562-1-pkshih@realtek.com