When devm_request_irq() fails, imx6_add_pcie_port() should return the real
error code instead of always returning -ENODEV.
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NBjorn Helgaas <helgaas@kernel.org>
Reviewed-by: NLucas Stach <l.stach@pengutronix.de>