export pcie_flr and remove copies of it in drivers

Subject: export pcie_flr and remove copies of it in drivers
From: Christoph Hellwig <hch@xxxxxx>
Date: Thu, 13 Apr 2017 16:53:32 +0200
Cc: linux-pci@xxxxxxxxxxxxxxx, qat-linux@xxxxxxxxx, linux-crypto@xxxxxxxxxxxxxxx, linux-rdma@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx

Hi all,

this exports the PCI layer pcie_flr helper, and removes various opencoded
copies of it.

Follow-Ups:
- Re: export pcie_flr and remove copies of it in drivers
  - From: Bjorn Helgaas
- [PATCH 1/7] PCI: export pcie_flr
  - From: Christoph Hellwig
- [PATCH 7/7] liquidio: use pcie_flr instead of duplicating it
  - From: Christoph Hellwig
- [PATCH 2/7] PCI: call pcie_flr from reset_intel_82599_sfp_virtfn
  - From: Christoph Hellwig
- [PATCH 3/7] PCI: call pcie_flr from reset_chelsio_generic_dev
  - From: Christoph Hellwig
- [PATCH 4/7] ixgbe: use pcie_flr instead of duplicating it
  - From: Christoph Hellwig
- [PATCH 5/7] IB/hfi1: use pcie_flr instead of duplicating it
  - From: Christoph Hellwig
- [PATCH 6/7] crypto: qat: use pcie_flr instead of duplicating it
  - From: Christoph Hellwig