lib/nvme: extend trtype to str with CUSTOM

Signed-off-by: Jacek Kalwas <jacek.kalwas@intel.com>
Change-Id: I519bb6bf0e930e0cd977ef4b5133bbdd7ca8af86
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/481952
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Seth Howell <seth.howell@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>

lib/nvme/nvme.c

@@ -814,6 +814,8 @@ spdk_nvme_transport_id_trtype_str(enum spdk_nvme_transport_type trtype)
 		return "FC";
 	case SPDK_NVME_TRANSPORT_TCP:
 		return "TCP";
+	case SPDK_NVME_TRANSPORT_CUSTOM:
+		return "CUSTOM";
 	default:
 		return NULL;
 	}