Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/net/8021q/vlanproc.c b/net/8021q/vlanproc.c
index d1314cf..d940c49 100644
--- a/net/8021q/vlanproc.c
+++ b/net/8021q/vlanproc.c
@@ -54,7 +54,7 @@
 
 /*
  *	Structures for interfacing with the /proc filesystem.
- *	VLAN creates its own directory /proc/net/vlan with the folowing
+ *	VLAN creates its own directory /proc/net/vlan with the following
  *	entries:
  *	config		device status/configuration
  *	<device>	entry for each  device