ARM: at91/defconfig: add support for KSZ ethernet switches

Enable DSA and KSZ9477 support as modules. Ethernet switches are used by
the SAMA5D2-ICP board.

Signed-off-by: Razvan Stefanescu <razvan.stefanescu@microchip.com>

Author: RazvanStef

arch/arm/configs/sama5_defconfig

@@ -63,6 +63,7 @@ CONFIG_IP_PNP_DHCP=y
 # CONFIG_INET6_XFRM_MODE_TUNNEL is not set
 # CONFIG_INET6_XFRM_MODE_BEET is not set
 CONFIG_IPV6_SIT_6RD=y
+CONFIG_NET_DSA=m
 CONFIG_CAN=y
 CONFIG_CAN_AT91=y
 CONFIG_CAN_M_CAN=y
@@ -100,6 +101,8 @@ CONFIG_BLK_DEV_SD=y
 # CONFIG_SCSI_LOWLEVEL is not set
 CONFIG_NETDEVICES=y
 # CONFIG_NET_VENDOR_ARC is not set
+CONFIG_NET_DSA_MICROCHIP_KSZ9477=m
+CONFIG_NET_DSA_MICROCHIP_KSZ9477_SPI=m
 CONFIG_MACB=y
 # CONFIG_NET_VENDOR_BROADCOM is not set
 # CONFIG_NET_VENDOR_CIRRUS is not set