usb: dwc3: debugfs: convert our regdump to use regsets

regset is a generic implementation of regdump
utility through debugfs.

Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 5f79d9f..b7ca82c 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -723,6 +723,7 @@
 
 	struct dwc3_hwparams	hwparams;
 	struct dentry		*root;
+	struct debugfs_regset32	*regset;
 
 	u8			test_mode;
 	u8			test_mode_nr;