staging: vc04_services: bcm2835-audio: Explicitly set DMA mask

staging: vc04_services: bcm2835-audio: Explicitly set DMA mask

In the following patches, vchiq_arm will be migrated to create and use
its own bus and all the vchiq drivers (bcm2835-camera, bcm2835-audio)
will be registered to it. Since the platform driver/device model
internally sets the DMA mask for its registered devices, we would have
to do it ourself when we remove the platform driver/device registration
for vchiq devices.

This patch explicitly sets the DMA mask to bcm2835-audio so as not
to introduce a regression when we move away from platform
device/driver model.

Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
Link: https://lore.kernel.org/r/20230923143200.268063-3-umang.jain@ideasonboard.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>