marvell: comphy: cp110: add support for USB comphy polarity invert

The polarity inversion for USB was not tested due to lack of hw design
which requires it. Currently all supported boards doesn't require USB
phy polarity inversion, therefore COMPHY_POLARITY_NO_INVERT is set for
all boards. Enable the option for the ones that need it.

Change-Id: Ia5f2ee313a93962e94963e2dd8a759ef6d9da369
Signed-off-by: Grzegorz Jaszczyk <jaz@semihalf.com>
diff --git a/drivers/marvell/comphy/phy-comphy-cp110.h b/drivers/marvell/comphy/phy-comphy-cp110.h
index 1dc3aa2..b4a2102 100644
--- a/drivers/marvell/comphy/phy-comphy-cp110.h
+++ b/drivers/marvell/comphy/phy-comphy-cp110.h
@@ -81,6 +81,10 @@
 	_Bool valid;
 };
 
+struct usb_params {
+	uint8_t polarity_invert;
+};
+
 int mvebu_cp110_comphy_is_pll_locked(uint64_t comphy_base,
 				     uint8_t comphy_index);
 int mvebu_cp110_comphy_power_off(uint64_t comphy_base,