arcnet: Move files out of include/linux

These #include files don't need to be in the include/linux directory
as they can be local to drivers/net/arcnet/

Move them and update the #include statements.

Update the MAINTAINERS file pattern by deleting arcdevice from the
NETWORKING block as arcnet is currently unmaintained.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
diff --git a/drivers/net/arcnet/com20020.c b/drivers/net/arcnet/com20020.c
index 00f910c..f46e220 100644
--- a/drivers/net/arcnet/com20020.c
+++ b/drivers/net/arcnet/com20020.c
@@ -37,11 +37,11 @@
 #include <linux/netdevice.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
-#include <linux/arcdevice.h>
-#include <linux/com20020.h>
-
 #include <linux/io.h>
 
+#include "arcdevice.h"
+#include "com20020.h"
+
 static char *clockrates[] = {
 	"XXXXXXX", "XXXXXXXX", "XXXXXX",
 	"2.5 Mb/s", "1.25Mb/s", "625 Kb/s", "312.5 Kb/s",