ARM: DT: STi: STiH407: Update picophyreset for the usb3 controllers usb2 phy

Ths picophyreset is incorrectly defined, which stops the usb2 phy being
taken out of reset.
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com>

arch/arm/boot/dts/stih407-family.dtsi

@@ -282,7 +282,7 @@ usb2_picophy0: phy1 {
 			#phy-cells = <0>;
 			st,syscfg = <&syscfg_core 0x100 0xf4>;
 			resets = <&softreset STIH407_PICOPHY_SOFTRESET>,
-				 <&picophyreset STIH407_PICOPHY0_RESET>;
+				 <&picophyreset STIH407_PICOPHY2_RESET>;
 			reset-names = "global", "port";
 		};