drivers: net: Add Felix DSA switch driver

This driver is used for the Ethernet switch integrated into LS1028A NXP.
Felix on LS1028A has 4 front panel ports and two internal ports, I/O
to/from the switch is done through an ENETC Ethernet interface.
The 4 front panel ports are available as Ethernet interfaces and can be
used with the typical network commands like tftp.

Signed-off-by: Alex Marginean <alexandru.marginean@nxp.com>
Signed-off-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
diff --git a/drivers/net/mscc_eswitch/Kconfig b/drivers/net/mscc_eswitch/Kconfig
index 80dd22f..ccf7822 100644
--- a/drivers/net/mscc_eswitch/Kconfig
+++ b/drivers/net/mscc_eswitch/Kconfig
@@ -36,3 +36,11 @@
 	select PHYLIB
 	help
 	  This driver supports the Serval network switch device.
+
+config MSCC_FELIX_SWITCH
+	bool "Felix switch driver"
+	depends on DM_DSA && DM_PCI
+	select FSL_ENETC
+	help
+	  This driver supports the Ethernet switch integrated in the
+	  NXP LS1028A SoC.