ata: AHCI and other non-SFF native drivers should depend on HAS_DMA

If NO_DMA=y:

    ERROR: "bad_dma_ops" [drivers/ata/libahci_platform.ko] undefined!
    ERROR: "dmam_alloc_coherent" [drivers/ata/libahci.ko] undefined!

Add a block dependency on HAS_DMA to fix this.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Tejun Heo <tj@kernel.org>

drivers/ata/Kconfig

@@ -80,6 +80,8 @@ config SATA_PMP
 	  This option adds support for SATA Port Multipliers
 	  (the SATA version of an ethernet hub, or SAS expander).
 
+if HAS_DMA
+
 comment "Controllers with non-SFF native interface"
 
 config SATA_AHCI
@@ -232,6 +234,8 @@ config SATA_SIL24
 
 	  If unsure, say N.
 
+endif # HAS_DMA
+
 config ATA_SFF
 	bool "ATA SFF support (for legacy IDE and PATA)"
 	default y