ARM: multi_v7_defconfig: Enable stih407 usb picophy

This patch enables the picoPHY usb phy which is used by
the usb2 and usb3 host controllers when controlling usb2/1.1
devices. It is found in stih407 family SoC's from STMicroelectronics.
Signed-off-by: NPeter Griffin <peter.griffin@linaro.org>
Acked-by: NLee Jones <lee.jones@linaro.org>
Reviewed-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NMaxime Coquelin <maxime.coquelin@st.com>

arch/arm/configs/multi_v7_defconfig

@@ -455,6 +455,7 @@ CONFIG_OMAP_USB2=y
 CONFIG_TI_PIPE3=y
 CONFIG_PHY_MIPHY365X=y
 CONFIG_PHY_STIH41X_USB=y
+CONFIG_PHY_STIH407_USB=y
 CONFIG_PHY_SUN4I_USB=y
 CONFIG_EXT4_FS=y
 CONFIG_AUTOFS4_FS=y