avision: add AD345F support as "basic"
Tested with Avision AD345F model number DL-1802B. Flatbed and ADF duplex scanning available.
Known limitation: ADF scanning is only capable to scan one sheet at a time via automatic feeder. Providing 2+ sheets breaks backend and scanner needs to be rebooted.
Signed-off-by: Nikolai Kostrigin nickel@altlinux.org Tested-by: Mikhail Chernonog snowmix@altlinux.org