ath5k: unify rx descriptor error handling

There is no reason for a special handling (return) here, just break like we do
with the checks before.

Signed-off-by: Bruno Randolf <br1@einfach.org>
Acked-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath5k/base.c

@@ -1937,8 +1937,7 @@ ath5k_tasklet_rx(unsigned long data)
 		else if (unlikely(ret)) {
 			ATH5K_ERR(sc, "error in processing rx descriptor\n");
 			sc->stats.rxerr_proc++;
-			spin_unlock(&sc->rxbuflock);
-			return;
+			break;
 		}
 
 		sc->stats.rx_all_count++;