b43: Clarify logged message after fatal DMA error and switch to PIO mode

The message following fatal DMA errors fails to indicate properly that the
driver has switched to PIO mode.
Signed-off-by: NLarry Finger <Larry.Finger@wfinger.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/b43/main.c

@@ -1804,7 +1804,7 @@ static void b43_do_interrupt_thread(struct b43_wldev *dev)
 			       dma_reason[2], dma_reason[3],
 			       dma_reason[4], dma_reason[5]);
 			b43err(dev->wl, "This device does not support DMA "
-			       "on your system. Please use PIO instead.\n");
+			       "on your system. It will now be switched to PIO.\n");
 			/* Fall back to PIO transfers if we get fatal DMA errors! */
 			dev->use_pio = 1;
 			b43_controller_restart(dev, "DMA error");