ARM: dts: ux500: Flag eMMCs as non-SDIO/SD

We use the no-sdio and no-sd flags to indicate that these eMMCs
are neither, so that the operating system can skip trying to
identify them as SDIO or SD during boot, which just takes time.

Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>