usb: dwc3-of-simple: fix error check of clk_get_bulk when disabled

The disabled clk API returns -ENOSYS unlike the reset API returning -ENOTSUPP.

Fixes: ca7fdc8b ("usb: host: Add simple of glue driver for DWC3 USB Controllers integration")
Reported-by: NJean-Jacques Hiblot <jjhiblot@ti.com>
Signed-off-by: NNeil Armstrong <narmstrong@baylibre.com>

drivers/usb/host/dwc3-of-simple.c

@@ -50,7 +50,7 @@ static int dwc3_of_simple_clk_init(struct udevice *dev,
 	int ret;
 
 	ret = clk_get_bulk(dev, &simple->clks);
-	if (ret == -ENOTSUPP)
+	if (ret == -ENOSYS)
 		return 0;
 	if (ret)
 		return ret;