spi/sirf: Depends on SIRF_DMA
spi/sirf: Depends on SIRF_DMA

Now that DMA support has been added to the driver it needs the
architecture DMA driver to be built in order to link.

Signed-off-by: Mark Brown <b51b9a92386687a9ac927cebfa0f978adeb8cea5@linaro.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs