dnet: DNET should depend on HAS_IOMEM

Signed-off-by: NIlya Yanok <yanok@emcraft.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/Kconfig

@@ -1042,7 +1042,7 @@ config NI65
 
 config DNET
 	tristate "Dave ethernet support (DNET)"
-	depends on NET_ETHERNET
+	depends on NET_ETHERNET && HAS_IOMEM
 	select PHYLIB
 	help
 	  The Dave ethernet interface (DNET) is found on Qong Board FPGA.