spi/s3c64xx: Remove S3C_DMA support
spi/s3c64xx: Remove S3C_DMA support

All the platforms which use the old S3C_DMA API have now been converted to
dmaengine so we can remove the legacy code from the driver, simplifying
maintenance.

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

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