pinctrl: cirrus: madera-core: Use devm_pinctrl_register_mappings()

Use devm_pinctrl_register_mappings(), so the mappings are automatically
unregistered by the core. If pinctrl_enable() failed during the probe,
pinctrl_mappings were not freed. Now it is done by the core.

Fixes: 218d72a7 ("pinctrl: madera: Add driver for Cirrus Logic Madera codecs")
Signed-off-by: Thomas Richard <thomas.richard@bootlin.com>
Reviewed-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://lore.kernel.org/20250609-pinctrl-madera-devm-pinctrl-register-mappings-v1-1-ba2c2822cf6c@bootlin.com


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