gpiolib: fix debugfs dangling chip separator

gpiolib: fix debugfs dangling chip separator

Add the missing newline after entries for recently removed gpio chips
so that the chip sections are separated by a newline as intended.

Fixes: e348544f7994 ("gpio: protect the list of GPIO devices with SRCU")
Cc: stable@vger.kernel.org	# 6.9
Cc: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20241028125000.24051-3-johan+linaro@kernel.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>