rtlwifi: rtl8821ae: setup 8812ae RFE according to device type

rtlwifi: rtl8821ae: setup 8812ae RFE according to device type

Current channel switch implementation sets 8812ae RFE reg value assuming
that device always has type 2.

Extend possible RFE types set and write corresponding reg values.

Source for new code is
http://dlcdnet.asus.com/pub/ASUS/wireless/PCE-AC51/DR_PCE_AC51_20232801152016.zip

Signed-off-by: Maxim Samoylov <max7255@gmail.com>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Stable <stable@vger.kernel.org>
Cc: Yan-Hsuan Chuang <yhchuang@realtek.com>
Cc: Pkshih <pkshih@realtek.com>
Cc: Birming Chiu <birming@realtek.com>
Cc: Shaofu <shaofu@realtek.com>
Cc: Steven Ting <steventing@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>