Enable direct flashing method in armbian-install menu

armbian/configng#705

Author: igorpecovnik

packages/bsp/common/usr/bin/armbian-install

@@ -929,6 +929,12 @@ main()
 		$(type -t write_uboot_platform_mtd) == function ]] 		&& options+=(7 'Install/Update the bootloader on MTD Flash')
 	fi
 
+	# show flasher if there are available block devices
+	armbian-config --api module_images status >/dev/null
+	if [[ $? -eq 0 ]]; then
+		options+=("8" "Download and flash clean image")
+	fi
+
 	[[ ${#options[@]} -eq 0 || "$root_uuid" == "$emmcuuid" || "$root_uuid" == "/dev/nand2" ]] && \
 	dialog --ok-label 'Cancel' --title ' Warning ' --backtitle "$backtitle" --colors --no-collapse --msgbox '\n\Z1There are no targets. Please check your drives.\Zn' 7 52
 	cmd=(dialog --title 'Choose an option:' --backtitle "$backtitle" --menu "\nCurrent root: $root_uuid \n              $rootchip (${root_partition_device})\n" 14 75 7)
@@ -1012,6 +1018,10 @@ main()
 				write_uboot_to_mtd_flash "$DIR" "$mtdcheck"
 				return
 				;;
+			8)
+				armbian-config --cmd FLASH1
+				return
+				;;
 
 			*)
                                 title='UEFI install to internal drive'