PCI: rockchip: dw: Set #PERST to low after suspend

As we don't do it in resume routine, so in order to be better
compatibale with devices, set it to low.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Change-Id: I0613e05f6d35ba7def7eedd902cfaff73d716952

drivers/pci/controller/dwc/pcie-dw-rockchip.c

@@ -1881,6 +1881,7 @@ static int __maybe_unused rockchip_dw_pcie_suspend(struct device *dev)
 
 	rk_pcie->in_suspend = true;
 
+	gpiod_set_value_cansleep(rk_pcie->rst_gpio, 0);
 	ret = rk_pcie_disable_power(rk_pcie);
 
 	return ret;