khadas-edge2: remove vendor branch, we've no kedge2 DT/patches for …

…it yet

config/boards/khadas-edge2.conf

@@ -3,7 +3,7 @@ declare -g BOARD_NAME="Khadas Edge2"
 declare -g BOARDFAMILY="rockchip-rk3588"
 declare -g BOARD_MAINTAINER="igorpecovnik"
 declare -g BOOT_SOC="rk3588" # Just to avoid errors in rockchip64_commmon
-declare -g KERNEL_TARGET="legacy,vendor,edge"
+declare -g KERNEL_TARGET="legacy,edge" # @TODO: khadas-edge2 doesn't have ',vendor' yet
 declare -g IMAGE_PARTITION_TABLE="gpt"
 declare -g BOOT_FDT_FILE="rockchip/rk3588s-khadas-edge2.dtb" # Specific to this board