dt-bindings: pinctrl: pinctrl-single: add ti,j7200-padconf compatible

Add the "ti,j7200-padconf" compatible to support suspend to ram on
j7200.

Signed-off-by: Thomas Richard <thomas.richard@bootlin.com>
Reviewed-by: Tony Lindgren <tony@atomide.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20231128-j7200-pinctrl-s2r-v1-1-704e7dc24460@bootlin.com


Signed-off-by: Linus Walleij <linus.walleij@linaro.org>