If NO_DMA=y:

    ERROR: "dma_set_mask" [drivers/net/ethernet/hisilicon/hns/hns_enet_drv.ko] undefined!
    ERROR: "dma_unmap_single" [drivers/net/ethernet/hisilicon/hns/hns_enet_drv.ko] undefined!
    ERROR: "dma_unmap_page" [drivers/net/ethernet/hisilicon/hns/hns_enet_drv.ko] undefined!
    ERROR: "dma_mapping_error" [drivers/net/ethernet/hisilicon/hns/hns_enet_drv.ko] undefined!
    ERROR: "dma_map_page" [drivers/net/ethernet/hisilicon/hns/hns_enet_drv.ko] undefined!
    ERROR: "dma_supported" [drivers/net/ethernet/hisilicon/hns/hns_enet_drv.ko] undefined!
    ERROR: "dma_map_single" [drivers/net/ethernet/hisilicon/hns/hns_enet_drv.ko] undefined!
    ERROR: "dma_set_mask" [drivers/net/ethernet/hisilicon/hns/hns_dsaf.ko] undefined!
    ERROR: "dma_supported" [drivers/net/ethernet/hisilicon/hns/hns_dsaf.ko] undefined!
    ERROR: "dma_unmap_single" [drivers/net/ethernet/hisilicon/hns/hnae.ko] undefined!
    ERROR: "dma_unmap_page" [drivers/net/ethernet/hisilicon/hns/hnae.ko] undefined!
    ERROR: "dma_mapping_error" [drivers/net/ethernet/hisilicon/hns/hnae.ko] undefined!
    ERROR: "dma_map_page" [drivers/net/ethernet/hisilicon/hns/hnae.ko] undefined!
    ERROR: "dma_map_single" [drivers/net/ethernet/hisilicon/hns/hnae.ko] undefined!
    ERROR: "dma_alloc_coherent" [drivers/net/ethernet/hisilicon/hix5hd2_gmac.ko] undefined!
    ERROR: "dma_mapping_error" [drivers/net/ethernet/hisilicon/hix5hd2_gmac.ko] undefined!
    ERROR: "dma_map_single" [drivers/net/ethernet/hisilicon/hix5hd2_gmac.ko] undefined!
    ERROR: "dma_unmap_single" [drivers/net/ethernet/hisilicon/hix5hd2_gmac.ko] undefined!
    ERROR: "dma_free_coherent" [drivers/net/ethernet/hisilicon/hix5hd2_gmac.ko] undefined!
    ERROR: "dma_alloc_coherent" [drivers/net/ethernet/hisilicon/hip04_eth.ko] undefined!
    ERROR: "dma_mapping_error" [drivers/net/ethernet/hisilicon/hip04_eth.ko] undefined!
    ERROR: "dma_map_single" [drivers/net/ethernet/hisilicon/hip04_eth.ko] undefined!
    ERROR: "dma_unmap_single" [drivers/net/ethernet/hisilicon/hip04_eth.ko] undefined!
    ERROR: "dma_free_coherent" [drivers/net/ethernet/hisilicon/hip04_eth.ko] undefined!

As this affects all of HNS_ENET, HNS_DSAF, HNS, HIX5HD2_GMAC, and
HIP04_ETH, add a dependency on HAS_DMA to the main NET_VENDOR_HISILICON
symbol to fix this.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>