RDMA/mlx4: Fix truncated output warning in alias_GUID.c

drivers/infiniband/hw/mlx4/alias_GUID.c: In function ‘mlx4_ib_init_alias_guid_service’:
drivers/infiniband/hw/mlx4/alias_GUID.c:878:74: error: ‘%d’ directive
output may be truncated writing between 1 and 11 bytes into a region of
size 5 [-Werror=format-truncation=]
  878 |                 snprintf(alias_wq_name, sizeof alias_wq_name, "alias_guid%d", i);
      |                                                                          ^~
drivers/infiniband/hw/mlx4/alias_GUID.c:878:63: note: directive argument in the range [-2147483641, 2147483646]
  878 |                 snprintf(alias_wq_name, sizeof alias_wq_name, "alias_guid%d", i);
      |                                                               ^~~~~~~~~~~~~~
drivers/infiniband/hw/mlx4/alias_GUID.c:878:17: note: ‘snprintf’ output
between 12 and 22 bytes into a destination of size 15
  878 |                 snprintf(alias_wq_name, sizeof alias_wq_name, "alias_guid%d", i);
      |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors

Fixes: a0c64a1 ("mlx4: Add alias_guid mechanism")
Link: https://lore.kernel.org/r/1951c9500109ca7e36dcd523f8a5f2d0d2a608d1.1718554641.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/hw/mlx4/alias_GUID.c

@@ -829,7 +829,7 @@ void mlx4_ib_destroy_alias_guid_service(struct mlx4_ib_dev *dev)
 
 int mlx4_ib_init_alias_guid_service(struct mlx4_ib_dev *dev)
 {
-	char alias_wq_name[15];
+	char alias_wq_name[22];
 	int ret = 0;
 	int i, j;
 	union ib_gid gid;