Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/include/linux/mroute6.h b/include/linux/mroute6.h
index 9d2deb2..a3759cb 100644
--- a/include/linux/mroute6.h
+++ b/include/linux/mroute6.h
@@ -249,7 +249,7 @@
  * Structure used to communicate from kernel to multicast router.
  * We'll overlay the structure onto an MLD header (not an IPv6 heder like igmpmsg{}
  * used for IPv4 implementation). This is because this structure will be passed via an
- * IPv6 raw socket, on wich an application will only receiver the payload i.e the data after
+ * IPv6 raw socket, on which an application will only receiver the payload i.e the data after
  * the IPv6 header and all the extension headers. (See section 3 of RFC 3542)
  */