Documentation: Fix typo in multiple files in Documentation

Correct multiple spelling typo in Documentation.

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Acked-by: Rob Landley <rob@landley.net>
Reported-by: Anders Larsen <al@alarsen.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/Documentation/blackfin/bfin-gpio-notes.txt b/Documentation/blackfin/bfin-gpio-notes.txt
index d36b01f..d245f39 100644
--- a/Documentation/blackfin/bfin-gpio-notes.txt
+++ b/Documentation/blackfin/bfin-gpio-notes.txt
@@ -53,7 +53,7 @@
 
 3. But there are some exceptions
     - Kernel permit the identical GPIO be requested both as GPIO and GPIO
-    interrut.
+    interrupt.
     Some drivers, like gpio-keys, need this behavior. Kernel only print out
     warning messages like,
 	bfin-gpio: GPIO 24 is already reserved by gpio-keys: BTN0, and you are