CAPI: Drop special controller lookup from capi20_put_message

This strange special rule to fall back to controller 1 cannot be derived
from the CAPI specs and looks a lot like it was once dedicated to some
out-of-tree driver, probably AVM's broken fcdsl2 (FRITZ!Card DSL v2.0).
I found no in-tree user that needs this check, and I'm now taking care
of the fcdsl2. So drop these bits from our stack.

Signed-off-by: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/isdn/capi/kcapi.c

@@ -777,11 +777,8 @@ u16 capi20_put_message(struct capi20_appl *ap, struct sk_buff *skb)
 	 * synchronizes this service with capi20_release.
 	 */
 	ctr = get_capi_ctr_by_nr(CAPIMSG_CONTROLLER(skb->data));
-	if (!ctr || ctr->state != CAPI_CTR_RUNNING) {
-		ctr = get_capi_ctr_by_nr(1); /* XXX why? */
-		if (!ctr || ctr->state != CAPI_CTR_RUNNING)
-			return CAPI_REGNOTINSTALLED;
-	}
+	if (!ctr || ctr->state != CAPI_CTR_RUNNING)
+		return CAPI_REGNOTINSTALLED;
 	if (ctr->blocked)
 		return CAPI_SENDQUEUEFULL;