Fix misc .c/.h comment typos

Fix various .c/.h typos in comments (no code changes).

Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
diff --git a/drivers/isdn/hardware/eicon/os_4bri.c b/drivers/isdn/hardware/eicon/os_4bri.c
index 11e6f93..7b4ec3f 100644
--- a/drivers/isdn/hardware/eicon/os_4bri.c
+++ b/drivers/isdn/hardware/eicon/os_4bri.c
@@ -464,7 +464,7 @@
 
 /*
 **  Cleanup function will be called for master adapter only
-**  this is garanteed by design: cleanup callback is set
+**  this is guaranteed by design: cleanup callback is set
 **  by master adapter only
 */
 static int diva_4bri_cleanup_adapter(diva_os_xdi_adapter_t * a)