MX31: add macros to configure spi pins

this adds convenience values usable by mxc_iomux_mode() to configure Pins of the
spi interfaces on mx31.

Signed-off-by: Luotao Fu <l.fu@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
1 file changed