Commit 4fa6b0bacf9c ("pci: stash device's PXM information in struct
pci_dev") added node field to xen/include/xen/pci.h. Its type,
nodeid_t, is defined in asm/numa.h and we should include this file
explicitly in pci.h
Reported-by: Julien Grall <julien.grall@linaro.org> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>