ata: ahci_da850: add compile test support

Add Kconfig dependendy on COMPILE_TEST to allow compile tests with
configs that do not enable ARCH_DAVINCI_DA850.
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>

drivers/ata/Kconfig

@@ -156,7 +156,7 @@ config AHCI_BRCM
 
 config AHCI_DA850
 	tristate "DaVinci DA850 AHCI SATA support"
-	depends on ARCH_DAVINCI_DA850
+	depends on ARCH_DAVINCI_DA850 || COMPILE_TEST
 	select SATA_HOST
 	help
 	  This option enables support for the DaVinci DA850 SoC's