net: via: VIA_RHINE and VIA_VELOCITY should depend on HAS_DMA

If NO_DMA=y:

ERROR: "dma_sync_single_for_cpu" [drivers/net/ethernet/via/via-rhine.ko] undefined!
ERROR: "dma_set_mask" [drivers/net/ethernet/via/via-rhine.ko] undefined!
ERROR: "dma_mapping_error" [drivers/net/ethernet/via/via-rhine.ko] undefined!
ERROR: "dma_map_single" [drivers/net/ethernet/via/via-rhine.ko] undefined!
ERROR: "dma_alloc_coherent" [drivers/net/ethernet/via/via-rhine.ko] undefined!
ERROR: "dma_free_coherent" [drivers/net/ethernet/via/via-rhine.ko] undefined!
ERROR: "dma_unmap_single" [drivers/net/ethernet/via/via-rhine.ko] undefined!
ERROR: "dma_map_page" [drivers/net/ethernet/via/via-velocity.ko] undefined!
ERROR: "dma_sync_single_for_cpu" [drivers/net/ethernet/via/via-velocity.ko] undefined!
ERROR: "dma_free_coherent" [drivers/net/ethernet/via/via-velocity.ko] undefined!
ERROR: "dma_unmap_single" [drivers/net/ethernet/via/via-velocity.ko] undefined!
ERROR: "dma_map_single" [drivers/net/ethernet/via/via-velocity.ko] undefined!
ERROR: "dma_alloc_coherent" [drivers/net/ethernet/via/via-velocity.ko] undefined!

Before, the symbols depended implicitly on HAS_DMA through PCI or
USE_OF. Add explicit dependencies on HAS_DMA to fix this.

Fixes: b7d3282a245f4428 ("net: via/Kconfig: replace USE_OF with OF_???")
Signed-off-by: Geert Uytterhoeven <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/ethernet/via/Kconfig

···
 config VIA_RHINE
 	tristate "VIA Rhine support"
 	depends on (PCI || OF_IRQ)
+	depends on HAS_DMA
 	select CRC32
 	select MII
 	---help---
···
 config VIA_VELOCITY
 	tristate "VIA Velocity support"
 	depends on (PCI || (OF_ADDRESS && OF_IRQ))
+	depends on HAS_DMA
 	select CRC32
 	select CRC_CCITT
 	select MII