configs: rpi4: Enable DM_DMA across all RPi4 configurations

The DM_DMA option is needed in order to translate physical address into
bus addresses on a per-device basis.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Peter Robinson <pbrobinson@gmail.com>
Signed-off-by: Matthias Brugger <mbrugger@suse.com>