[ARM] 3358/1: [S3C2410] add missing SPI DMA resources

Patch from Albrecht Dre

Add DMA resources to s3c2410 spi platform devices - dma_(alloc|free)_coherent should now work as expected.

Signed-off-by: Albrecht Dre <albrecht.dress@lios-tech.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>