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/MAINTAINERS b/MAINTAINERS
index a310b84..4a8b32c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -701,6 +701,11 @@
 F:	drivers/pci_endpoint/
 F:  include/pci_ep.h
 
+PCI MPC85xx
+M:	Heiko Schocher <hs@denx.de>
+S:	Maintained
+F:	drivers/pci/pci_mpc85xx.c
+
 POWER
 M:	Jaehoon Chung <jh80.chung@samsung.com>
 S:	Maintained