b43: fix split of N-PHY devices into supported and not (based on PHY rev)

Signed-off-by: Rafał Miłecki <[e-mail]>
Signed-off-by: John W. Linville <[e-mail]>

drivers/net/wireless/b43/main.c

···
 		break;
 #ifdef CONFIG_B43_NPHY
 	case B43_PHYTYPE_N:
-		if (phy_rev > 4)
+		if (phy_rev > 2)
 			unsupported = 1;
 		break;
 #endif

drivers/net/wireless/b43/phy_n.c

···
 	if (phy->rev >= 3)
 		b43_nphy_spur_workaround(dev);
 
-	b43err(dev->wl, "IEEE 802.11n devices are not supported, yet.\n");
 	return 0;
 }