configs: ls1021a-tsn: enable sja1105 switch driver

The sja1105 is a 5-port switch that uses a DM_DSA driver. Its 5th (CPU)
port is connected internally to the eth2 port of the LS1021A SoC.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/configs/ls1021atsn_qspi_defconfig b/configs/ls1021atsn_qspi_defconfig
index d92fdf4..148c1f4 100644
--- a/configs/ls1021atsn_qspi_defconfig
+++ b/configs/ls1021atsn_qspi_defconfig
@@ -53,6 +53,8 @@
 CONFIG_PHY_FIXED=y
 CONFIG_DM_ETH=y
 CONFIG_DM_MDIO=y
+CONFIG_DM_DSA=y
+CONFIG_SJA1105=y
 CONFIG_PHY_GIGE=y
 CONFIG_MII=y
 CONFIG_TSEC_ENET=y
diff --git a/configs/ls1021atsn_sdcard_defconfig b/configs/ls1021atsn_sdcard_defconfig
index a745857..da379a5 100644
--- a/configs/ls1021atsn_sdcard_defconfig
+++ b/configs/ls1021atsn_sdcard_defconfig
@@ -68,6 +68,8 @@
 CONFIG_PHY_FIXED=y
 CONFIG_DM_ETH=y
 CONFIG_DM_MDIO=y
+CONFIG_DM_DSA=y
+CONFIG_SJA1105=y
 CONFIG_PHY_GIGE=y
 CONFIG_MII=y
 CONFIG_TSEC_ENET=y