RDMA/ocrdma: Fix structure layout for ocrdma_alloc_pd

The udata's for alloc_pd cannot contain u64s due to alignment
constraints. Switch the two never-used u64's to arrays of u32 to reduce
the required struct alignment to 4 bytes.

These reserved fields are totally unnecessary, never written and never
read.
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

include/uapi/rdma/ocrdma-abi.h

@@ -65,7 +65,7 @@ struct ocrdma_alloc_ucontext_resp {
 };
 
 struct ocrdma_alloc_pd_ureq {
-	__u64 rsvd1;
+	__u32 rsvd[2];
 };
 
 struct ocrdma_alloc_pd_uresp {
@@ -73,7 +73,7 @@ struct ocrdma_alloc_pd_uresp {
 	__u32 dpp_enabled;
 	__u32 dpp_page_addr_hi;
 	__u32 dpp_page_addr_lo;
-	__u64 rsvd1;
+	__u32 rsvd[2];
 };
 
 struct ocrdma_create_cq_ureq {