uboot-phytec

at91: taurus: Enable DM_SPI

Enable DM_SPI for atmel SPI driver on taurus board.

Kept few functions related to non-dm and gpio on board
files for reference and will be remove once code moved
to relevant drivers.

Cc: Heiko Schocher <hs@denx.de>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>