pci: add DM based mpc85xx driver

add DM based PCI Configuration space access support for
MPC85xx PCI Bridge. This driver is based on
arch/powerpc/cpu/mpc85xx/pci.c

In the old driver there is a fix for a hw issue on the
TARGET_MPC8555CDS and TARGET_MPC8541CDS boards. As I
have no such hardware I did not port this part.

Signed-off-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index 19e7b50..71aab85 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -68,6 +68,13 @@
 	  PowerPC MPC85xx, MPC86xx, B series, P series and T series SoCs.
 	  This driver does not support SRIO_PCIE_BOOT feature.
 
+config PCI_MPC85XX
+	bool "MPC85XX PowerPC PCI support"
+	depends on DM_PCI
+	help
+	  Say Y here if you want to enable PCI controller support on FSL
+	  PowerPC MPC85xx SoC.
+
 config PCI_RCAR_GEN2
 	bool "Renesas RCar Gen2 PCIe driver"
 	depends on DM_PCI