southbridge/amd agesa & cimx spelling fixes

Trivial fixes, but the editor highlights them, and it's easy to go
through a bunch of files while I'm otherwise idle.

Change-Id: I5d2d4ba098d2a95f7643f000f4b48b3349a8e6cf
Signed-off-by: Martin Roth <martin.roth@se-eng.com>
Reviewed-on: http://review.coreboot.org/7839
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>

src/southbridge/amd/cimx/sb800/early.c

@@ -58,7 +58,7 @@ void sb_Poweron_Init(void)
 	//AmdSbDispatcher(&sb_early_cfg);
 	//TODO
 	//AMD_IMAGE_HEADER was missing, when using AmdSbDispatcher,
-	// VerifyImage() will fail, LocateImage() take minitues to find the image.
+	// VerifyImage() will fail, LocateImage() take minutes to find the image.
 	sbPowerOnInit(&sb_early_cfg);
 }