SD uses the following pins starting from 247:
    SDCD, SDWP, SDVOLC, SDCLK, SDCMD, SDDAT{0,1,2,3}
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Link: https://lore.kernel.org/r/1564465410-9165-6-git-send-email-hayashi.kunihiko@socionext.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>