gpio: shared: ignore disabled nodes when traversing the device-tree

Don't consider disabled devices when traversing the device-tree looking
for shared GPIOs. Even if they do share a phandle to a pin, they can
never be instantiated and request it.

Fixes: a060b8c ("gpiolib: implement low-level, shared GPIO support")
Link: https://lore.kernel.org/r/20251203092309.34737-1-bartosz.golaszewski@oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>

Author: Bartosz Golaszewski

drivers/gpio/gpiolib-shared.c

@@ -77,6 +77,10 @@ gpio_shared_find_entry(struct fwnode_handle *controller_node,
 /* Handle all special nodes that we should ignore. */
 static bool gpio_shared_of_node_ignore(struct device_node *node)
 {
+	/* Ignore disabled devices. */
+	if (!of_device_is_available(node))
+		return true;
+
 	/*
 	 * __symbols__ is a special, internal node and should not be considered
 	 * when scanning for shared GPIOs.