Enable DM and DM_SPI support for both Cyclone 5 and Arria 5 boards,
since they use drivers which require those.

Signed-off-by: Marek Vasut
Cc: Chin Liang See
Cc: Dinh Nguyen
Acked-by: Pavel Machek
Acked-by: Simon Glass
Acked-by: Stefan Roese
Cc: Tom Rini
Cc: Vince Bridgers