[SCSI] mpt2sas: Add Extended Type for Diagnostic Buffer support

Added tests for registry entries of EXBuffSize, EXImmed, and EXType to
support the new Extended diag buffer type.  Modified code where necessary to
handle the new ExtendedType field in the F/W diagnostic Post and Release
messages.

Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: Eric Moore <Eric.moore@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/drivers/scsi/mpt2sas/mpt2sas_ctl.h b/drivers/scsi/mpt2sas/mpt2sas_ctl.h
index 211f296..8a5eeb1 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_ctl.h
+++ b/drivers/scsi/mpt2sas/mpt2sas_ctl.h
@@ -313,7 +313,7 @@
  * struct mpt2_diag_register - application register with driver
  * @hdr - generic header
  * @reserved -
- * @buffer_type - specifies either TRACE or SNAPSHOT
+ * @buffer_type - specifies either TRACE, SNAPSHOT, or EXTENDED
  * @application_flags - misc flags
  * @diagnostic_flags - specifies flags affecting command processing
  * @product_specific - product specific information
@@ -352,7 +352,7 @@
  * struct mpt2_diag_query - query relevant info associated with diag buffers
  * @hdr - generic header
  * @reserved -
- * @buffer_type - specifies either TRACE or SNAPSHOT
+ * @buffer_type - specifies either TRACE, SNAPSHOT, or EXTENDED
  * @application_flags - misc flags
  * @diagnostic_flags - specifies flags affecting command processing
  * @product_specific - product specific information