IB/mad: Support alternate Base Versions when creating MADs

In preparation to support the new OPA MAD Base version, add a base version
parameter to ib_create_send_mad and set it to IB_MGMT_BASE_VERSION for current
users.

Definition of the new base version and it's processing will occur in later
patches.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
diff --git a/include/rdma/ib_mad.h b/include/rdma/ib_mad.h
index c0ea51f..bf03ce0 100644
--- a/include/rdma/ib_mad.h
+++ b/include/rdma/ib_mad.h
@@ -618,6 +618,7 @@
  *   automatically adjust the allocated buffer size to account for any
  *   additional padding that may be necessary.
  * @gfp_mask: GFP mask used for the memory allocation.
+ * @base_version: Base Version of this MAD
  *
  * This routine allocates a MAD for sending.  The returned MAD send buffer
  * will reference a data buffer usable for sending a MAD, along
@@ -633,7 +634,8 @@
 					   u32 remote_qpn, u16 pkey_index,
 					   int rmpp_active,
 					   int hdr_len, int data_len,
-					   gfp_t gfp_mask);
+					   gfp_t gfp_mask,
+					   u8 base_version);
 
 /**
  * ib_is_mad_class_rmpp - returns whether given management class