cs89x0: fix warning release_irq label

release_irq label is only used when ALLOW_DMA is defined.

drivers/net/cs89x0.c: In function 'net_open':
drivers/net/cs89x0.c:1401: warning: label 'release_irq' defined but not used
Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

drivers/net/cs89x0.c

@@ -1397,9 +1397,7 @@ net_open(struct net_device *dev)
 release_dma:
 #if ALLOW_DMA
 		free_dma(dev->dma);
-#endif
 release_irq:
-#if ALLOW_DMA
 		release_dma_buff(lp);
 #endif
                 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) & ~(SERIAL_TX_ON | SERIAL_RX_ON));