net: dsa: mv88e6xxx: move driver in its own folder

With the upcoming support for cross-chip operations and other mv88e6xxx
enhancements, new files will be added.

Similarly to mlxsw or b53, move mv88e6xxx files into their own folder.

In the meantime, update the MAINTAINERS entry to please checkpatch.pl,
by replacing the invalid 88E6352 entry with 88E6XXX, maintained by
Andrew and myself.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/Kconfig

@@ -9,14 +9,6 @@ config NET_DSA_MV88E6060
 	  This enables support for the Marvell 88E6060 ethernet switch
 	  chip.
 
-config NET_DSA_MV88E6XXX
-	tristate "Marvell 88E6xxx Ethernet switch chip support"
-	depends on NET_DSA
-	select NET_DSA_TAG_EDSA
-	---help---
-	  This enables support for most of the Marvell 88E6xxx models of
-	  Ethernet switch chips, except 88E6060.
-
 config NET_DSA_BCM_SF2
 	tristate "Broadcom Starfighter 2 Ethernet switch support"
 	depends on HAS_IOMEM && NET_DSA
@@ -30,4 +22,6 @@ config NET_DSA_BCM_SF2
 
 source "drivers/net/dsa/b53/Kconfig"
 
+source "drivers/net/dsa/mv88e6xxx/Kconfig"
+
 endmenu