Add description on how to enable random fault injection
for MMC IO.
Signed-off-by: NPer Forlin <per.forlin@linaro.org>
Acked-by: NAkinobu Mita <akinobu.mita@gmail.com>
Reviewed-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NChris Ball <cjb@laptop.org>