ARM: imx_v6_v7_defconfig: add CONFIG_I2C_MUX_GPIO

I2C muxing is used on Nitrogen6_MAX board from Boundary Devices.

Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
1 file changed