pinctrl: bcm281xx: Use "unsigned int" instead of bare "unsigned"

Replace uses of bare "unsigned" with "unsigned int" to fix checkpatch
warnings. No functional change.

Signed-off-by: Artur Weber <aweber.kernel@gmail.com>
Link: https://lore.kernel.org/20250303-bcm21664-pinctrl-v3-2-5f8b80e4ab51@gmail.com


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