rtl_bt: Add firmware and config file for RTL8822BE

rtl_bt: Add firmware and config file for RTL8822BE

This device is a new model from Realtek. Updates to driver btrtl will
soon be submitted to the kernel.

These files were provided by the Realtek developer.

Signed-off-by: 陆朱伟 <alex_lu@realsil.com.cn>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: linux-bluetooth@vger.kernel.org
[bwh: Fixed the filename wildcard in WHENCE]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>