ARM: dts: stm32: add phy-names to usbotg_hs on stm32mp157c-ev1

phy-names is required by usbotg_hs driver to get the phy, otherwise, it
considers that there is no phys property.
Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>

arch/arm/boot/dts/stm32mp157c-ev1.dts

@@ -355,6 +355,7 @@ &usbh_ehci {
 &usbotg_hs {
 	dr_mode = "peripheral";
 	phys = <&usbphyc_port1 0>;
+	phy-names = "usb2-phy";
 	status = "okay";
 };