ata: ahci-pci: Fix dependency on DM_PCI

File drivers/ata/ahci-pci.c calls function ahci_probe_scsi_pci() which is
compiled only when DM_PCI is enabled. So add missing dependency into
Kconfig.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 6f0b772..0c1490a 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -36,6 +36,7 @@
 
 config AHCI_PCI
 	bool "Support for PCI-based AHCI controller"
+	depends on DM_PCI
 	depends on DM_SCSI
 	help
 	  Enables support for the PCI-based AHCI controller.