doc: fix broken references

There are numerous broken references to Documentation files (in other
Documentation files, in comments, etc.). These broken references are
caused by typo's in the references, and by renames or removals of the
Documentation files. Some broken references are simply odd.

Fix these broken references, sometimes by dropping the irrelevant text
they were part of.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/scsi/megaraid/megaraid_mbox.c b/drivers/scsi/megaraid/megaraid_mbox.c
index 2e6619e..8883ca3 100644
--- a/drivers/scsi/megaraid/megaraid_mbox.c
+++ b/drivers/scsi/megaraid/megaraid_mbox.c
@@ -67,7 +67,7 @@
  *
  * NEC	MegaRAID PCI Express ROMB	1000	0408	1033	8287
  *
- * For history of changes, see Documentation/ChangeLog.megaraid
+ * For history of changes, see Documentation/scsi/ChangeLog.megaraid
  */
 
 #include <linux/slab.h>