spi: support spi without dma channel to use can_dma()

For spi without dma channel and use can_dma(), it can
use master->dev for struct device.

Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --cc drivers/spi/spi.c
Simple merge