b43/b43legacy: fix left-over URLs and ifdefs

Fix some left-over URLs and ifdefs in b43 and b43legacy drivers.

Signed-off-by: Stefano Brivio <stefano.brivio@polimi.it>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/b43legacy/dma.c b/drivers/net/wireless/b43legacy/dma.c
index 8cb3dc4..83161d9 100644
--- a/drivers/net/wireless/b43legacy/dma.c
+++ b/drivers/net/wireless/b43legacy/dma.c
@@ -996,7 +996,7 @@
 
 	err = ssb_dma_set_mask(dev->dev, dmamask);
 	if (err) {
-#ifdef BCM43XX_PIO
+#ifdef CONFIG_B43LEGACY_PIO
 		b43legacywarn(dev->wl, "DMA for this device not supported. "
 			"Falling back to PIO\n");
 		dev->__using_pio = 1;