Documentation: fix minor typos/spelling

Fix some minor typos:
 * informations => information
 * there own => their own
 * these => this

Signed-off-by: Sylvestre Ledru <sylvestre.ledru@scilab.org>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Documentation/networking/batman-adv.txt

@@ -72,7 +72,7 @@ folder:
 #  fragmentation    gw_sel_class  vis_mode
 
 
-There is a special folder for debugging informations:
+There is a special folder for debugging information:
 
 #  ls /sys/kernel/debug/batman_adv/bat0/
 #  gateways     socket        transtable_global  vis_data