Use devm_mfd_add_devices() for MFD devices registration and get
rid of .remove callback to remove MFD child-devices. This is done
by managed device framework.
Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com>
Reviewed-by: NAndreas Werner <andreas.werner@men.de>
Signed-off-by: NLee Jones <lee.jones@linaro.org>