configs: T4240RDB: enable DM_I2C

This enable DM_I2C in T4240RDB defconfigs

Signed-off-by: Biwen Li <biwen.li@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/configs/T4240RDB_defconfig b/configs/T4240RDB_defconfig
index d74afc7..a47615e 100644
--- a/configs/T4240RDB_defconfig
+++ b/configs/T4240RDB_defconfig
@@ -59,3 +59,4 @@
 CONFIG_FSL_ESPI=y
 CONFIG_USB=y
 CONFIG_DM_USB=y
+CONFIG_DM_I2C=y