leds: documentation: 'ide-disk' to 'disk-activity'

Signed-off-by: Stephan Linz <linz@li-pro.net>
Cc: Joseph Jezak <josejx@gentoo.org>
Cc: Jörg Sommer <joerg@alea.gnuu.de>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
diff --git a/Documentation/laptops/asus-laptop.txt b/Documentation/laptops/asus-laptop.txt
index 79a1bc6..5f28587 100644
--- a/Documentation/laptops/asus-laptop.txt
+++ b/Documentation/laptops/asus-laptop.txt
@@ -72,7 +72,7 @@
     echo 1 >  /sys/class/leds/asus::mail/brightness
   will switch the mail LED on.
   You can also know if they are on/off by reading their content and use
-  kernel triggers like ide-disk or heartbeat.
+  kernel triggers like disk-activity or heartbeat.
 
 Backlight
 ---------