include/linux/leds-regulator.h: fix syntax in example code

Fix struct field initializer syntax in some example code from a comment,
this will make copying and pasting the code more straightforward.

Signed-off-by: Antonio Ospite <ospite@studenti.unina.it>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

include/linux/leds-regulator.h

@@ -16,7 +16,7 @@
  * Use "vled" as supply id when declaring the regulator consumer:
  *
  * static struct regulator_consumer_supply pcap_regulator_VVIB_consumers [] = {
- * 	{ .dev_name = "leds-regulator.0", supply = "vled" },
+ * 	{ .dev_name = "leds-regulator.0", .supply = "vled" },
  * };
  *
  * If you have several regulator driven LEDs, you can append a numerical id to