powerpc/eeh: Replace device_node with pci_dn in eeh_ops

There are 3 EEH operations whose arguments contain device_node:
read_config(), write_config() and restore_config(). The patch
replaces device_node with pci_dn.

Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --cc arch/powerpc/include/asm/eeh.h
Simple merge

diff --cc arch/powerpc/kernel/eeh.c
Simple merge

diff --cc arch/powerpc/kernel/eeh_pe.c
Simple merge

diff --cc arch/powerpc/platforms/powernv/eeh-powernv.c
Simple merge

diff --cc arch/powerpc/platforms/pseries/eeh_pseries.c
Simple merge