ARM: multi_v7_defconfig: Enable BRCMSTB networking

Enable the required drivers and subsystems to bring-up networking on
Broadcom's Set-top Box SoCs: BCMGENET and SF2. These two drivers both
have proper dependencies on their internal PHY and MDIO drivers.
Acked-by: Scott Branden <scott.branden@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

arch/arm/configs/multi_v7_defconfig

@@ -158,6 +158,8 @@ CONFIG_INET6_IPCOMP=m
 CONFIG_IPV6_MIP6=m
 CONFIG_IPV6_TUNNEL=m
 CONFIG_IPV6_MULTIPLE_TABLES=y
+CONFIG_NET_DSA=m
+CONFIG_NET_SWITCHDEV=y
 CONFIG_CAN=y
 CONFIG_CAN_RAW=y
 CONFIG_CAN_BCM=y
@@ -166,6 +168,7 @@ CONFIG_CAN_AT91=m
 CONFIG_CAN_RCAR=m
 CONFIG_CAN_XILINXCAN=y
 CONFIG_CAN_MCP251X=y
+CONFIG_NET_DSA_BCM_SF2=m
 CONFIG_CAN_SUN4I=y
 CONFIG_BT=m
 CONFIG_BT_MRVL=m
@@ -225,6 +228,8 @@ CONFIG_VIRTIO_NET=y
 CONFIG_HIX5HD2_GMAC=y
 CONFIG_SUN4I_EMAC=y
 CONFIG_MACB=y
+CONFIG_BCMGENET=m
+CONFIG_SYSTEMPORT=m
 CONFIG_NET_CALXEDA_XGMAC=y
 CONFIG_GIANFAR=y
 CONFIG_IGB=y