ARM: configs: Enable FIXED_PHY in multi_v7 defconfig

CONFIG_FIXED_PHY is needed to have Ethernet working on STi boards.

Select it as built-in since RootFS is accessible from NFS on these boards.
Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/configs/multi_v7_defconfig

@@ -220,6 +220,7 @@ CONFIG_SMSC_PHY=y
 CONFIG_BROADCOM_PHY=y
 CONFIG_ICPLUS_PHY=y
 CONFIG_MICREL_PHY=y
+CONFIG_FIXED_PHY=y
 CONFIG_USB_PEGASUS=y
 CONFIG_USB_USBNET=y
 CONFIG_USB_NET_SMSC75XX=y