gigaset: get rid of info() and warn() macros

Join the move away from the obsolete info() macro, opencoding the
remaining uses. While we're at it, also get rid of the warn() macro
by promoting the three remaining uses to err().

Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/isdn/gigaset/interface.c

@@ -701,7 +701,7 @@ void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname,
 
 	ret = tty_register_driver(tty);
 	if (ret < 0) {
-		warn("failed to register tty driver (error %d)", ret);
+		err("failed to register tty driver (error %d)", ret);
 		goto error;
 	}
 	gig_dbg(DEBUG_IF, "tty driver initialized");
@@ -709,7 +709,7 @@ void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname,
 	return;
 
 enomem:
-	warn("could not allocate tty structures");
+	err("could not allocate tty structures");
 error:
 	if (drv->tty)
 		put_tty_driver(drv->tty);