arm/arm64: defconfig: Update configs to use the new CROS_EC options

We refactored the CrOS EC drivers moving part of the code from the MFD
subsystem to the platform chrome subsystem. During this change we needed
to rename some config options, so, update the defconfigs accordingly.

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Gwendal Grignou <gwendal@chromium.org>
Tested-by: Gwendal Grignou <gwendal@chromium.org>
Acked-by: Lee Jones <lee.jones@linaro.org>