Add binding for the TI's sdhci-omap controller. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>