Disables the power down feature to make USB host and OTG ports work
again on rockchip device due to some rework done in kernel >= 4.18.
This patch is based upon the one from Hal Emmerich available at
<https://patchwork.kernel.org/patch/10535905/>, but the original patch
had some minor issues:

- whitespaces instead of tabs triggers an error when patch is used
- power_down attribute is set to 0 and not *false* like sorrounding code

diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c
index f03e41879224..492607adc506 100644
--- a/drivers/usb/dwc2/params.c
+++ b/drivers/usb/dwc2/params.c
@@ -82,6 +82,7 @@ static void dwc2_set_rk_params(struct dwc2_hsotg *hsotg)
	p->host_perio_tx_fifo_size = 256;
	p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 <<
		GAHBCFG_HBSTLEN_SHIFT;
+	p->power_down = false;
 }

 static void dwc2_set_ltq_params(struct dwc2_hsotg *hsotg)