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/Makefile b/drivers/pci/Makefile
index b1d3dc8..856ac71 100644
--- a/drivers/pci/Makefile
+++ b/drivers/pci/Makefile
@@ -19,6 +19,7 @@
 obj-$(CONFIG_FSL_PCI_INIT) += fsl_pci_init.o
 obj-$(CONFIG_PCI_INDIRECT_BRIDGE) += pci_indirect.o
 obj-$(CONFIG_PCI_GT64120) += pci_gt64120.o
+obj-$(CONFIG_PCI_MPC85XX) += pci_mpc85xx.o
 obj-$(CONFIG_PCI_MSC01) += pci_msc01.o
 obj-$(CONFIG_PCIE_IMX) += pcie_imx.o
 obj-$(CONFIG_FTPCI100) += pci_ftpci100.o