mpc83xx: add QE ethernet support

this patch adds support for the QUICC Engine based UCC gigabit ethernet device.
diff --git a/Makefile b/Makefile
index 323aafc..45c1a49 100644
--- a/Makefile
+++ b/Makefile
@@ -203,6 +203,9 @@
 LIBS += drivers/libdrivers.a
 LIBS += drivers/nand/libnand.a
 LIBS += drivers/nand_legacy/libnand_legacy.a
+ifeq ($(CPU),mpc83xx)
+LIBS += drivers/qe/qe.a
+endif
 LIBS += drivers/sk98lin/libsk98lin.a
 LIBS += post/libpost.a post/cpu/libcpu.a
 LIBS += common/libcommon.a