ipa: remove bogus driver_name parameter from ipa_client_create

This parameter is not required since the line that we pass as
parameter already has one driver attached.
diff --git a/src/input/hsl.c b/src/input/hsl.c
index 60eea17..040dbce 100644
--- a/src/input/hsl.c
+++ b/src/input/hsl.c
@@ -507,7 +507,7 @@
 
 		link = ipa_client_link_create(tall_hsl_ctx,
 					      &line->ts[E1INP_SIGN_OML-1],
-					      "hsl", E1INP_SIGN_OML,
+					      E1INP_SIGN_OML,
 					      line->ops->cfg.ipa.addr,
 					      HSL_TCP_PORT,
 					      hsl_bts_connect,