Correct some common spelling mistakes

- occured -> occurred
- accomodate -> accommodate
- existant -> existent
- asssertion -> assertion
- manangement -> management
- cotroller -> controller

Change-Id: Ibd6663752466d691fabbdc216ea05f2b58ac12d1
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/12850
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/mainboard/via/vt8454c/devicetree.cb

@@ -45,7 +45,7 @@ chip northbridge/via/cx700
 				end
 			end # superio
 		end # pci 11.0
-		# 1-4 non existant
+		# 1-4 non existent
 		#device pci 11.5 on end # AC97 Audio
 		#device pci 11.6 off end # AC97 Modem
 		#device pci 12.0 on end  # Ethernet