- Update Xen patches to c/s 1272.
- xen-pciback: drop SR-IOV VFs when PF driver unloads
  (bsc#901839).
- x86, mm: Create slow_virt_to_phys() (fate#317533).
- x86, mm: Pagetable level size/shift/mask helpers (fate#317533).
- Update EC2 config files (SERIO=n).

suse-commit: 291b79bcc306317a27b9f78b62ea905ab419ef0a