rtl8812au: Add out-of-tree driver.

Use a forked version of the rtl8812au driver that works better
with OpenWRT (fix compile bugs, fix phy MAC address, etc)

Signed-off-by: Ben Greear <greearb@candelatech.com>
[update to 2018-11-16, replace rtw_byteorder.h, rename folder]
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

package/kernel/rtl8812au-ct/patches/001-use-kernel-byteorder.patch

@@ -0,0 +1,15 @@
+Fix compile problem when rtw_byteorder.h and asm/byteorder.h gets 
+included in addition for example indirectly, do not use realtek own copy 
+of the byteorder headers.
+
+--- a/include/drv_types.h
++++ b/include/drv_types.h
+@@ -30,7 +30,7 @@
+ #include <drv_conf.h>
+ #include <basic_types.h>
+ #include <osdep_service.h>
+-#include <rtw_byteorder.h>
++#include <asm/byteorder.h>
+ #include <wlan_bssdef.h>
+ #include <wifi.h>
+ #include <ieee80211.h>