doc/input : Fix typos in Documentation/input

This patch fix spelling typos in Documentations/input.

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
diff --git a/Documentation/input/yealink.txt b/Documentation/input/yealink.txt
index 5360e43..8277b76 100644
--- a/Documentation/input/yealink.txt
+++ b/Documentation/input/yealink.txt
@@ -93,7 +93,7 @@
   Format specifier
     '8' :  Generic 7 segment digit with individual addressable segments
 
-    Reduced capability 7 segm digit, when segments are hard wired together.
+    Reduced capability 7 segment digit, when segments are hard wired together.
     '1' : 2 segments digit only able to produce a 1.
     'e' : Most significant day of the month digit,
           able to produce at least 1 2 3.