ethernet: synopsys: SYNOPSYS_DWC_ETH_QOS should depend on HAS_DMA

If NO_DMA=y:

    ERROR: "dma_alloc_coherent" [drivers/net/ethernet/synopsys/dwc_eth_qos.ko] undefined!
    ERROR: "dma_free_coherent" [drivers/net/ethernet/synopsys/dwc_eth_qos.ko] undefined!
    ERROR: "dma_unmap_single" [drivers/net/ethernet/synopsys/dwc_eth_qos.ko] undefined!
    ERROR: "dma_map_page" [drivers/net/ethernet/synopsys/dwc_eth_qos.ko] undefined!
    ERROR: "dma_mapping_error" [drivers/net/ethernet/synopsys/dwc_eth_qos.ko] undefined!
    ERROR: "dma_map_single" [drivers/net/ethernet/synopsys/dwc_eth_qos.ko] undefined!

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Lars Persson <larper@axis.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/synopsys/Kconfig

@@ -20,7 +20,7 @@ config SYNOPSYS_DWC_ETH_QOS
 	select PHYLIB
 	select CRC32
 	select MII
-	depends on OF
+	depends on OF && HAS_DMA
 	---help---
 	  This driver supports the DWC Ethernet QoS from Synopsys