[rdk-b][common][bsp][Refactor and sync kernel/wifi from Openwrt]

[Description]
Refactor and sync kernel/wifi from Openwrt

[Release-log]
N/A

diff --git a/recipes-kernel/linux-mac80211/files/patches/build/070-remove-broken-wext-select.patch b/recipes-kernel/linux-mac80211/files/patches/build/070-remove-broken-wext-select.patch
new file mode 100644
index 0000000..77b6e1d
--- /dev/null
+++ b/recipes-kernel/linux-mac80211/files/patches/build/070-remove-broken-wext-select.patch
@@ -0,0 +1,10 @@
+--- a/drivers/staging/rtl8723bs/Kconfig
++++ b/drivers/staging/rtl8723bs/Kconfig
+@@ -5,7 +5,6 @@ config RTL8723BS
+ 	depends on m
+ 	depends on WLAN && MMC && CFG80211
+ 	depends on m
+-	select CFG80211_WEXT
+ 	select BPAUTO_CRYPTO_LIB_ARC4
+ 	help
+ 	This option enables support for RTL8723BS SDIO drivers, such as