arm64: dts: ti: k3-j7200: use ti,j7200-padconf compatible

For suspend to ram on j7200, use ti,j7200-padconf compatible to save and
restore pinctrl contexts.

Signed-off-by: Thomas Richard <thomas.richard@bootlin.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20231128-j7200-pinctrl-s2r-v1-3-704e7dc24460@bootlin.com


Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>