Documentation: power: Fix typo in Documentation/power

This patch fix spelling typos found in Documentation/power.

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
diff --git a/Documentation/power/suspend-and-interrupts.txt b/Documentation/power/suspend-and-interrupts.txt
index 6966364..2f9c5a5 100644
--- a/Documentation/power/suspend-and-interrupts.txt
+++ b/Documentation/power/suspend-and-interrupts.txt
@@ -77,7 +77,7 @@
 in a special way.  Namely, the IRQ remains enabled, by on the first interrupt
 it will be disabled, marked as pending and "suspended" so that it will be
 re-enabled by resume_device_irqs() during the subsequent system resume.  Also
-the PM core is notified about the event which casues the system suspend in
+the PM core is notified about the event which causes the system suspend in
 progress to be aborted (that doesn't have to happen immediately, but at one
 of the points where the suspend thread looks for pending wakeup events).