net: add MSCC Ocelot switch support

This patch adds support for the Microsemi Ethernet switch present on
Ocelot SoCs.

Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index ff55e03..39ce4e8 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -432,6 +432,13 @@
 	  This driver implements support for the Socionext AVE Ethernet
 	  controller, as found on the Socionext UniPhier family.
 
+config MSCC_OCELOT_SWITCH
+	bool "Ocelot switch driver"
+	depends on DM_ETH && ARCH_MSCC
+	select PHYLIB
+	help
+	  This driver supports the Ocelot network switch device.
+
 config ETHER_ON_FEC1
 	bool "FEC1"
 	depends on MPC8XX_FEC