ARM: multi_v7_defconfig: Enable support for missing ChromeOS EC drivers

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

arch/arm/configs/multi_v7_defconfig

@@ -298,6 +298,7 @@ CONFIG_I2C_ST=y
 CONFIG_I2C_TEGRA=y
 CONFIG_I2C_XILINX=y
 CONFIG_I2C_RCAR=y
+CONFIG_I2C_CROS_EC_TUNNEL=m
 CONFIG_SPI=y
 CONFIG_SPI_ATMEL=m
 CONFIG_SPI_CADENCE=y
@@ -365,6 +366,7 @@ CONFIG_MFD_AS3722=y
 CONFIG_MFD_BCM590XX=y
 CONFIG_MFD_AXP20X=y
 CONFIG_MFD_CROS_EC=y
+CONFIG_MFD_CROS_EC_I2C=m
 CONFIG_MFD_CROS_EC_SPI=y
 CONFIG_MFD_MAX77686=y
 CONFIG_MFD_MAX8907=y
@@ -568,6 +570,8 @@ CONFIG_NVEC_POWER=y
 CONFIG_NVEC_PAZ00=y
 CONFIG_QCOM_GSBI=y
 CONFIG_COMMON_CLK_QCOM=y
+CONFIG_CHROME_PLATFORMS=y
+CONFIG_CROS_EC_CHARDEV=m
 CONFIG_COMMON_CLK_MAX77686=y
 CONFIG_COMMON_CLK_MAX77802=m
 CONFIG_APQ_MMCC_8084=y