ARM: dts: align sdio numbers to HW definition

Clean up the sdio numbering to be 1-base as defined in HW spec,
instead of the current 0-base

Signed-off-by: Christian Daudt <csd@broadcom.com>
Reviewed-by: Alex Elder <elder@linaro.org>
ARM: dts: add sdio blocks to bcm28155-ap board

Enable sdio for bcm28155 AP board

Signed-off-by: Christian Daudt <csd@broadcom.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Reviewed-by: Markus Mayer <markus.mayer@linaro.org>