ARM: multi_v5_defconfig: Enable I2C_GPIO

A GPIO based I2C bus is used by at least some Atmel reference boards,
including the AT91SAM9G20-EK which is in CI, enable the driver as a
module to improve test coverage and help users of systems that happen to
use it.
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230109-arm-multi-v5-i2c-gpio-v1-1-78e191358548@kernel.orgSigned-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/configs/multi_v5_defconfig

@@ -138,6 +138,7 @@ CONFIG_HW_RANDOM_TIMERIOMEM=m
 CONFIG_I2C_CHARDEV=y
 CONFIG_I2C_ASPEED=m
 CONFIG_I2C_AT91=y
+CONFIG_I2C_GPIO=m
 CONFIG_I2C_IMX=y
 CONFIG_I2C_MV64XXX=y
 CONFIG_SPI=y