Pull VFIO updates from Alex Williamson:

 - Virtualize PCI MPS and MRRS registers

 - Avoid soft lockups on SPAPR when clearing TCE

 - Broadcom FlexRM platform device support

 - Samples driver cleanup & type1 integer overflow fix

* tag 'vfio-v4.15-rc1' of git://github.com/awilliam/linux-vfio:
  vfio: platform: reset: Add Broadcom FlexRM reset module
  vfio/type1: silence integer overflow warning
  vfio-mdev/samples: make mdev_fops const and static
  vfio/spapr: Add cond_resched() for huge updates
  vfio/pci: Virtualize Maximum Read Request Size
  vfio/pci: Virtualize Maximum Payload Size