uboot-envtools: ath79: add support for YunCore XD4200 and A782

Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>
(cherry picked from commit 5d2a900163)

package/boot/uboot-envtools/files/ath79

@@ -27,7 +27,9 @@ netgear,wnr612-v2|\
 ocedo,koala|\
 ocedo,raccoon|\
 openmesh,om5p-ac-v2|\
-yuncore,a770)
+yuncore,a770|\
+yuncore,a782|\
+yuncore,xd4200)
 	ubootenv_add_uci_config "/dev/mtd1" "0x0" "0x10000" "0x10000"
 	;;
 netgear,wndr3700)