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: e348544 ("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>

Author: jhovold

drivers/gpio/gpiolib.c

@@ -4971,7 +4971,7 @@ static int gpiolib_seq_show(struct seq_file *s, void *v)
 
 	gc = srcu_dereference(gdev->chip, &gdev->srcu);
 	if (!gc) {
-		seq_printf(s, "%s%s: (dangling chip)",
+		seq_printf(s, "%s%s: (dangling chip)\n",
 			   priv->newline ? "\n" : "",
 			   dev_name(&gdev->dev));
 		return 0;