added DMA masks also to SPI driver setup

Added a missing DMA mask to board-config to make it work "correctly" with an alternative SPI-Driver that also implement Transfers via DMA to reduce CPU load...

Please apply to help people work with out of tree drivers.

Note: it may be also be of interrest to look at the config to find other such missing DMA settings...

Thanks,
             Martin

p.s: the same patch can also get applied to 3.6.y and 3.11.y