linux-phytec-ti

mfd: cros_ec: Detect in-progress commands

Some commands take a while to execute. Use -EAGAIN to signal this to the
caller.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>