leds: Move led_init_default_state_get() to the global header

There are users inside and outside LED framework that have implemented
a local copy of led_init_default_state_get(). In order to deduplicate
that, as the first step move the declaration from LED header to the
global one.

Signed-off-by: Andy Shevchenko <[e-mail]>
Signed-off-by: Lee Jones <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/leds/leds.h

···
 ssize_t led_trigger_write(struct file *filp, struct kobject *kobj,
 			struct bin_attribute *bin_attr, char *buf,
 			loff_t pos, size_t count);
-enum led_default_state led_init_default_state_get(struct fwnode_handle *fwnode);
 
 extern struct rw_semaphore leds_list_lock;
 extern struct list_head leds_list;

include/linux/leds.h

···
 	bool devname_mandatory;
 };
 
+enum led_default_state led_init_default_state_get(struct fwnode_handle *fwnode);
+
 struct led_hw_trigger_type {
 	int dummy;
 };