pds_vdpa: fix up format-truncation complaint

Our friendly kernel test robot has recently been pointing out
some format-truncation issues.  Here's a fix for one of them.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202311040109.RfgJoE7L-lkp@intel.com/
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Message-Id: <20231110221802.46841-2-shannon.nelson@amd.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>

Author: emusln

drivers/vdpa/pds/debugfs.c

@@ -261,7 +261,7 @@ void pds_vdpa_debugfs_add_vdpadev(struct pds_vdpa_aux *vdpa_aux)
 	debugfs_create_file("config", 0400, vdpa_aux->dentry, vdpa_aux->pdsv, &config_fops);
 
 	for (i = 0; i < vdpa_aux->pdsv->num_vqs; i++) {
-		char name[8];
+		char name[16];
 
 		snprintf(name, sizeof(name), "vq%02d", i);
 		debugfs_create_file(name, 0400, vdpa_aux->dentry,