staging: octeon-ethernet: add missing include

ethernet-mem was missing its own include file, causing sparse to complain
about undeclared global functions.
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/octeon/ethernet-mem.c

@@ -30,6 +30,7 @@
 
 #include <asm/octeon/octeon.h>
 
+#include "ethernet-mem.h"
 #include "ethernet-defines.h"
 
 #include <asm/octeon/cvmx-fpa.h>