linux-imx

MLK-19048: pinctrl: add defer probe check for pinctrl setting assertion

Pinctrl support of a device tree property "pinctrl-assert-gpios"
under client device node to select function at a board level pin
multiplexer. The pin route is controlled by a GPIO or i2c/spi expander
GPIO.

For i2c/spi expander GPIO, it may be loaded after client device that
set "pinctrl-assert-gpios" property in devicetree. Then the client device's
pin function doesn't work.

So it should add defer probe check for the GPIO pin.

Acked-by: Leonard Crestez <leonard.crestez@nxp.com>
Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: Arulpandiyan Vadivel <arulpandiyan_vadivel@mentor.com>