arm64: defconfig: Enable pinctrl-based I2C mux

The commit 84b1d6c ("ARM: dts: bcm2711-rpi: Add pinctrl-based
multiplexing for I2C0") introduced multiplexing for I2C on BCM2711-based
Raspberry Pi boards. Unfortunately we missed to enable the necessary
driver in the defconfig.

Cc: Laurent Pinchart <[email protected]>
Link: https://lore.kernel.org/linux-devicetree/961b3d43-b4c9-4573-82d7-844aa129d994@notapiano/
Signed-off-by: Stefan Wahren <[email protected]>
Reviewed-by: Laurent Pinchart <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Florian Fainelli <[email protected]>

Author: lategoodbye

arch/arm64/configs/defconfig

@@ -516,6 +516,7 @@ CONFIG_TCG_TIS_I2C_INFINEON=y
 CONFIG_I2C_CHARDEV=y
 CONFIG_I2C_MUX=y
 CONFIG_I2C_MUX_PCA954x=y
+CONFIG_I2C_MUX_PINCTRL=m
 CONFIG_I2C_BCM2835=m
 CONFIG_I2C_CADENCE=m
 CONFIG_I2C_DESIGNWARE_CORE=y