platform/chrome: cros_ec_sensorhub: Retries when a sensor is not ready

[ Upstream commit 981d7f91 ]

When the EC/ISH starts, it can take a while for all the sensors to be up
and running or declared broken.

If the sensor stack return -EBUSY when checking for sensor information,
retry up to 50 times.
It has been observed 100ms wait time is enough to have valid sensors
ready. It can take more time in case a sensor is really broken and is
not coming up.

Signed-off-by: Gwendal Grignou <gwendal@google.com>
Link: https://lore.kernel.org/r/20250623210518.306740-1-gwendal@google.com


Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>