ath5k: Fix reporting of RX dma stop failure

 * Correctly report failure to stop RX DMA
Signed-off-by: Nick Kossifidis <mickflemm@gmail.com>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

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

@@ -72,7 +72,7 @@ static int ath5k_hw_stop_rx_dma(struct ath5k_hw *ah)
 			i--)
 		udelay(100);
 
-	if (i)
+	if (!i)
 		ATH5K_DBG(ah->ah_sc, ATH5K_DEBUG_DMA,
 				"failed to stop RX DMA !\n");