mlx4_core: Fix GFP flags parameters to be gfp_t

Otherwise sparse gives a bunch of warnings like

    drivers/net/ethernet/mellanox/mlx4/srq.c:110:66: sparse: incorrect type in argument 4 (different base types)
    drivers/net/ethernet/mellanox/mlx4/srq.c:110:66:    expected int [signed] gfp
    drivers/net/ethernet/mellanox/mlx4/srq.c:110:66:    got restricted gfp_t
Signed-off-by: Roland Dreier <roland@purestorage.com>

drivers/net/ethernet/mellanox/mlx4/icm.c

@@ -246,7 +246,7 @@ int mlx4_UNMAP_ICM_AUX(struct mlx4_dev *dev)
 }
 
 int mlx4_table_get(struct mlx4_dev *dev, struct mlx4_icm_table *table, u32 obj,
-		   int gfp)
+		   gfp_t gfp)
 {
 	u32 i = (obj & (table->num_obj - 1)) /
 			(MLX4_TABLE_CHUNK_SIZE / table->obj_size);

drivers/net/ethernet/mellanox/mlx4/icm.h

@@ -72,7 +72,7 @@ struct mlx4_icm *mlx4_alloc_icm(struct mlx4_dev *dev, int npages,
 void mlx4_free_icm(struct mlx4_dev *dev, struct mlx4_icm *icm, int coherent);
 
 int mlx4_table_get(struct mlx4_dev *dev, struct mlx4_icm_table *table, u32 obj,
-		   int gfp);
+		   gfp_t gfp);
 void mlx4_table_put(struct mlx4_dev *dev, struct mlx4_icm_table *table, u32 obj);
 int mlx4_table_get_range(struct mlx4_dev *dev, struct mlx4_icm_table *table,
 			 u32 start, u32 end);

drivers/net/ethernet/mellanox/mlx4/qp.c

@@ -316,7 +316,7 @@ int __mlx4_qp_alloc_icm(struct mlx4_dev *dev, int qpn, gfp_t gfp)
 	return err;
 }
 
-static int mlx4_qp_alloc_icm(struct mlx4_dev *dev, int qpn, int gfp)
+static int mlx4_qp_alloc_icm(struct mlx4_dev *dev, int qpn, gfp_t gfp)
 {
 	u64 param = 0;