spi: mxs: Add support DM/DTS for i.MX28 mxs SPI driver (DM_SPI conversion)

This patch converts mxs_spi driver to support DM/DTS.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Marek Vasut <marex@denx.de>
1 file changed