Port of Linux commit a9f4c2d

    iatu_unroll_enabled flag is set only for Designware in host mode.

    However iATU unroll can be applicable for endpoint mode too. Set
    iatu_unroll_enabled flag in dw_pcie_setup() which is common for
    both host mode and endpoint mode.

    Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
    Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>