mmc: sdhci-omap: Allow SDIO card power off and enable aggressive PM

Allow powering off SDIO cards and enable runtime PM for eMMC/SD card
devices. Without this, SDIO WLAN devices will not idle.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20211015104720.52240-6-tony@atomide.com


Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>