tree-wide: fix misspelling of "definition" in comments

"Definition" is misspelled "defintion" in several comments; this
patch fixes them. No code changes.

Signed-off-by: Adam Buchbinder <adam.buchbinder@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/include/linux/in6.h b/include/linux/in6.h
index 718bf21..010290d 100644
--- a/include/linux/in6.h
+++ b/include/linux/in6.h
@@ -113,7 +113,7 @@
 #define IPV6_FLOWINFO_FLOWLABEL		0x000fffff
 #define IPV6_FLOWINFO_PRIORITY		0x0ff00000
 
-/* These defintions are obsolete */
+/* These definitions are obsolete */
 #define IPV6_PRIORITY_UNCHARACTERIZED	0x0000
 #define IPV6_PRIORITY_FILLER		0x0100
 #define IPV6_PRIORITY_UNATTENDED	0x0200