usb: dwc3: Do core validation early on probe

The setting of the dr_mode may need to check the controller's revision.
The revision is set in the dwc3_core_is_valid(), which comes after
dr_mode setting. Let's move it closer to the start of the dwc3_probe()
function and before calling dwc3_get_dr_mode().
Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

drivers/usb/dwc3/core.c

@@ -896,12 +896,6 @@ static int dwc3_core_init(struct dwc3 *dwc)
 	u32			reg;
 	int			ret;
 
-	if (!dwc3_core_is_valid(dwc)) {
-		dev_err(dwc->dev, "this is not a DesignWare USB3 DRD Core\n");
-		ret = -ENODEV;
-		goto err0;
-	}
-
 	/*
 	 * Write Linux Version Code to our GUID register so it's easy to figure
 	 * out which kernel version a bug was found.
@@ -1429,6 +1423,11 @@ static int dwc3_probe(struct platform_device *pdev)
 	dwc->regs	= regs;
 	dwc->regs_size	= resource_size(&dwc_res);
 
+	if (!dwc3_core_is_valid(dwc)) {
+		dev_err(dwc->dev, "this is not a DesignWare USB3 DRD Core\n");
+		return -ENODEV;
+	}
+
 	dwc3_get_properties(dwc);
 
 	dwc->reset = devm_reset_control_get_optional_shared(dev, NULL);