add AcTux-3 board support

Signed-off-by: Michael Schwingen <michael@schwingen.org>
diff --git a/board/actux3/config.mk b/board/actux3/config.mk
new file mode 100644
index 0000000..9a634cd
--- /dev/null
+++ b/board/actux3/config.mk
@@ -0,0 +1,4 @@
+TEXT_BASE = 0x00e00000
+
+# include NPE ethernet driver
+BOARDLIBS = cpu/ixp/npe/libnpe.a