wifi: rtw88: station mode only for SDIO chips

wifi: rtw88: station mode only for SDIO chips

Since only station mode has been tested on SDIO chips, only keep it support
for SDIO chips to reflect correct supported features.

Link: https://lore.kernel.org/linux-wireless/87wmpu1do6.fsf@kernel.org/T/#t
Link: https://lore.kernel.org/linux-wireless/36972ff5-0c48-4bd2-8f9a-9649bfa24225@lexina.in/
Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://msgid.link/20240327004155.7172-1-pkshih@realtek.com