pci: pcie_dw_ti: migrate to common Designware PCIe functions

Migrate the dw_ti driver to use the common DW PCIe helpers.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index ab5a5e7..318d8fa 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -264,7 +264,7 @@
 
 config PCI_KEYSTONE
 	bool "TI Keystone PCIe controller"
-	depends on DM_PCI
+	select PCIE_DW_COMMON
 	help
 	  Say Y here if you want to enable PCI controller support on AM654 SoC.