firmware: add rtl8723b bluetooth firmware

copied from https://github.com/rockchip-linux/rk-rootfs-build/commit/9625f4ad023b6528d6da7ec4c340c48a4074e9a2

firmware: add rtl8723b bluetooth firmware
copied from https://github.com/rockchip-linux/rk-rootfs-build/commit/9625f4ad023b6528d6da7ec4c340c48a4074e9a2
4fb35870 · Jonas Karlman · 03ef36a7 · 4fb35870 · 4fb35870 · 4fb35870
Commit 4fb35870 authored Feb 28, 2018 by Jonas Karlman
--- a/firmware/bin/rtk_hciattach
+++ b/firmware/bin/rtk_hciattach
--- a/firmware/bluetooth/rtl8723b_config
+++ b/firmware/bluetooth/rtl8723b_config
--- a/firmware/bluetooth/rtl8723b_fw
+++ b/firmware/bluetooth/rtl8723b_fw