ip-link: do not support 'ip link add dev help'

Commit 05325552 ('Support "ip link add help" for rtnl_link API') added a
check for specified help parameter. Though due to the place where it has
been added to, it is not possible anymore to force a given parameter to
be interpreted as interface name by prefixing it with 'dev '. Fix this
by forcing whatever follows 'dev' to be presumed as interface name.
Signed-off-by: Phil Sutter <phil@nwl.cc>

ip/iplink.c

@@ -647,11 +647,11 @@ int iplink_parse(int argc, char **argv, struct iplink_req *req,
 			addattr8(&req->n, sizeof(*req), IFLA_PROTO_DOWN,
 				 proto_down);
 		} else {
-			if (strcmp(*argv, "dev") == 0)
-				NEXT_ARG();
-
 			if (matches(*argv, "help") == 0)
 				usage();
+
+			if (strcmp(*argv, "dev") == 0)
+				NEXT_ARG();
 			if (*dev)
 				duparg2("dev", *argv);
 			*dev = *argv;