configs: Enable NET_DSA for Ethernet switches

Set NET_DSA=m to allow some DSA-based switch devices to be used. Note
that no switch models have been enabled, the intention being that DKMS
can be used to build them. Note also that the feature has only been
added to 64-bit kernels, since it causes the kernel to grow by about
65kB.

See: #6899

Signed-off-by: Phil Elwell <phil@raspberrypi.com>

Author: pelwell

arch/arm64/configs/bcm2711_defconfig

@@ -352,6 +352,7 @@ CONFIG_L2TP_IP=m
 CONFIG_L2TP_ETH=m
 CONFIG_BRIDGE=m
 CONFIG_BRIDGE_VLAN_FILTERING=y
+CONFIG_NET_DSA=m
 CONFIG_VLAN_8021Q=m
 CONFIG_VLAN_8021Q_GVRP=y
 CONFIG_ATALK=m

arch/arm64/configs/bcm2711_rt_defconfig

@@ -352,6 +352,7 @@ CONFIG_L2TP_IP=m
 CONFIG_L2TP_ETH=m
 CONFIG_BRIDGE=m
 CONFIG_BRIDGE_VLAN_FILTERING=y
+CONFIG_NET_DSA=m
 CONFIG_VLAN_8021Q=m
 CONFIG_VLAN_8021Q_GVRP=y
 CONFIG_ATALK=m

arch/arm64/configs/bcm2712_defconfig

@@ -355,6 +355,7 @@ CONFIG_L2TP_IP=m
 CONFIG_L2TP_ETH=m
 CONFIG_BRIDGE=m
 CONFIG_BRIDGE_VLAN_FILTERING=y
+CONFIG_NET_DSA=m
 CONFIG_VLAN_8021Q=m
 CONFIG_VLAN_8021Q_GVRP=y
 CONFIG_ATALK=m