The dw_pcie_host_ops structures are never modified.  Constify these
structures such that these can be write-protected.
Signed-off-by: NJisheng Zhang <jszhang@marvell.com>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>
Acked-by: NJingoo Han <jingoohan1@gmail.com>
Acked-by: NKishon Vijay Abraham I <kishon@ti.com>