RDMA/siw: Correct wrong debug message

We need to print num_sle first then pbl->max_buf per the condition.
Also replace mem->pbl with pbl while at it.

Fixes: 303ae1cdfd ("rdma/siw: application interface")
Signed-off-by: Guoqing Jiang <guoqing.jiang@linux.dev>
Link: https://lore.kernel.org/r/20230821133255.31111-3-guoqing.jiang@linux.dev
Acked-by: Bernard Metzler <bmt@zurich.ibm.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>

drivers/infiniband/sw/siw/siw_verbs.c

@@ -1494,7 +1494,7 @@ int siw_map_mr_sg(struct ib_mr *base_mr, struct scatterlist *sl, int num_sle,
 
 	if (pbl->max_buf < num_sle) {
 		siw_dbg_mem(mem, "too many SGE's: %d > %d\n",
-			    mem->pbl->max_buf, num_sle);
+			    num_sle, pbl->max_buf);
 		return -ENOMEM;
 	}
 	for_each_sg(sl, slp, num_sle, i) {