ARM: ux500: add device sdi1 for SDIO

Adds device sdi1 for ST-Ericsson HREFv60 and later to enable
the possiblity of using the onboard CW1200 chip for WLAN.

Signed-off-by: Stefan Nilsson XK <stefan.xk.nilsson@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>