gpio: nomadik: use devres version of clk_get*()

Replace call to clk_get() by call to devm_clk_get(). Allow automatic
cleanup of the clock in case of probe error.

Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://lore.kernel.org/r/20240228-mbly-gpio-v2-18-3ba757474006@bootlin.com


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