gprs-ns2: Fix stringification of NS/FR NSVCI

Before this commit, gprs_ns2_ll_str_buf() would always return an empty
string.

Change-Id: I6ec07f58fa5cbb7ec4be967b2c72ae75935e4f75
diff --git a/src/gb/gprs_ns2.c b/src/gb/gprs_ns2.c
index 30716fc..7fc737b 100644
--- a/src/gb/gprs_ns2.c
+++ b/src/gb/gprs_ns2.c
@@ -261,11 +261,6 @@
 		snprintf(buf, buf_len, "frgre)");
 		break;
 	case GPRS_NS2_LL_FR:
-		if (!gprs_ns2_is_frgre_bind(nsvc->bind)) {
-			buf[0] = '\0';
-			return buf;
-		}
-
 		snprintf(buf, buf_len, "fr)netif: %s dlci: %u", gprs_ns2_fr_bind_netif(nsvc->bind),
 			 gprs_ns2_fr_nsvc_dlci(nsvc));
 		break;