mlx5_core: Adjust hca_cap.uar_page_sz to conform to Connect-IB spec

Sparse reported an endianness bug in the assignment to hca_cap.uar_page_sz.

Fix the declaration of this field to be __be16 (which is what is in
the firmware spec), renaming the field to log_uar_pg_size to conform
to the spec, which fixes the endianness bug reported by sparse.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Moshe Lazer <moshel@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
diff --git a/include/linux/mlx5/device.h b/include/linux/mlx5/device.h
index 5139091..8de8d8f 100644
--- a/include/linux/mlx5/device.h
+++ b/include/linux/mlx5/device.h
@@ -317,8 +317,8 @@
 	u8	log_max_pd;
 	u8	rsvd25;
 	u8	log_max_xrcd;
-	u8	rsvd26[40];
-	__be32  uar_page_sz;
+	u8	rsvd26[42];
+	__be16  log_uar_page_sz;
 	u8	rsvd27[28];
 	u8	log_msx_atomic_size_qp;
 	u8	rsvd28[2];