arm: mvebu: spi.h: Add registers for direct write access

The direct write config register is needed for SPI direct write mode
configuration.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Luka Perkov <luka.perkov@sartura.hr>
Signed-off-by: Stefan Roese <sr@denx.de>
1 file changed