uboot-imx

arm: socfpga: Add Designware (DW) SPI support to config header

Enable support for the DW master SPI controller in the config header
for the SoCFPGA. This controller can only be enabled, if DT support
is enabled.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Chin Liang See <clsee@altera.com>
Cc: Dinh Nguyen <dinguyen@altera.com>
Cc: Vince Bridgers <vbridger@altera.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Pavel Machek <pavel@denx.de>