southbridge/amd/cimx/sbX00/early.c: Update grammar in comments

Along with the spelling fixes, it was requested that I correct this
comment.  Updating "LocateImage() take minutes" to
"LocateImage() takes minutes" everywhere that comment occurs.

Change-Id: I28cd47476cb42ba3e404e064695a7fd97d581834
Signed-off-by: Martin Roth <martin.roth@se-eng.com>
Reviewed-on: http://review.coreboot.org/7848
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

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 minutes to find the image.
+	// VerifyImage() will fail, LocateImage() takes minutes to find the image.
 	sbPowerOnInit(&sb_early_cfg);
 }