pinctrl: nomadik: fix build warning (-Wpointer-to-int-cast)

Fix compiler warning found in the pinctrl-nomadik platform driver. GCC
message is as such:

drivers/pinctrl/nomadik/pinctrl-nomadik.c:1169:12: warning: cast from
pointer to integer of different size [-Wpointer-to-int-cast]

Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://lore.kernel.org/r/20240228-mbly-gpio-v2-9-3ba757474006@bootlin.com


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