Enable the needed Kconfig options to have support for the ChromeOS EC
I2C transport, I2C tunnel and chardev user-space interface.
Signed-off-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Reviewed-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>