usb: dwc3: add P3 in U2 SS inactive quirk

This patch adds P3 in U2 SS inactive quirk, and some special platforms can
configure that if it is needed.

[ balbi@ti.com : added DeviceTree binding documentation ]

Signed-off-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/dwc3/platform_data.h b/drivers/usb/dwc3/platform_data.h
index 3f21591..cf92c81 100644
--- a/drivers/usb/dwc3/platform_data.h
+++ b/drivers/usb/dwc3/platform_data.h
@@ -30,4 +30,5 @@
 	unsigned disable_scramble_quirk:1;
 	unsigned has_lpm_erratum:1;
 	unsigned u2exit_lfps_quirk:1;
+	unsigned u2ss_inp3_quirk:1;
 };