configs: sama5d27_som1_ek: enable qspi controller and flashes

We use a sst spi-nor flash memory on sama5d27_som1_ek. Select
the others for testing purposes.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>