dsa: add support for the Marvell 88E6060 switch chip

Add support for the Marvell 88E6060 switch chip.  This chip only
supports the Header and Trailer tagging formats, and we use it in
Trailer mode since that mode is slightly easier to handle than
Header mode.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Tested-by: Byron Bradley <byron.bbradley@gmail.com>
Tested-by: Tim Ellis <tim.ellis@mac.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/dsa/Kconfig b/net/dsa/Kconfig
index 505aa14..3f2fd39 100644
--- a/net/dsa/Kconfig
+++ b/net/dsa/Kconfig
@@ -28,6 +28,13 @@
 	bool
 	default n
 
+config NET_DSA_MV88E6060
+	bool "Marvell 88E6060 ethernet switch chip support"
+	select NET_DSA_TAG_TRAILER
+	---help---
+	  This enables support for the Marvell 88E6060 ethernet switch
+	  chip.
+
 config NET_DSA_MV88E6XXX_NEED_PPU
 	bool
 	default n