spi: omap2-mcspi: remove private DMA API implementation

Remove the private DMA API implementation from spi-omap2-mcspi.c,
making it use entirely the DMA engine API.

Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
1 file changed