gpio: bcm-kona: Add missing newline to dev_err format string

Add a missing newline to the format string of the "Couldn't get IRQ
for bank..." error message.

Fixes: 757651e3 ("gpio: bcm281xx: Add GPIO driver")
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Markus Mayer <mmayer@broadcom.com>
Signed-off-by: Artur Weber <aweber.kernel@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20250206-kona-gpio-fixes-v2-3-409135eab780@gmail.com


Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>