Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/drivers/media/video/v4l2-ioctl.c b/drivers/media/video/v4l2-ioctl.c
index a01ed39..506edcc2 100644
--- a/drivers/media/video/v4l2-ioctl.c
+++ b/drivers/media/video/v4l2-ioctl.c
@@ -48,7 +48,7 @@
 			printk(KERN_CONT "%s: " fmt, vfd->name, ## arg);\
 		} while (0)
 
-/* Zero out the end of the struct pointed to by p.  Everthing after, but
+/* Zero out the end of the struct pointed to by p.  Everything after, but
  * not including, the specified field is cleared. */
 #define CLEAR_AFTER_FIELD(p, field) \
 	memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \