wifi: rtw89: 8851b: add 8851B basic chip_info

8851B is a 1x1 80 MHz bandwidth chip working on 2/5 GHz. Add these basic
information, and more settings will be added by functions.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230421024551.29994-2-pkshih@realtek.com