pinctrl: amlogic-a4: Drop surplus semicolon

The kernel bots complain about untidy code found using
coccinelle, fix it up.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202503212354.Hx2qaDRe-lkp@intel.com/


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