Build the BERI boot loader on 64-bit MIPS (but not 32-bit MIPS). While

these binaries aren't immediately useful on other MIPSes, still build them
as part of mips64 world in order to expose them to tinderbox.

MFC after:	3 weeks
Sponsored by:	DARPA, AFRL

sys/boot/mips/Makefile

@@ -1,6 +1,11 @@
 # $FreeBSD$
 
-.if 0
+#
+# The BERI boot loader port works only on 64-bit MIPS; not a hard port to
+# 32-bit if someone is interested.  Build on all 64-bit MIPS platforms to
+# ensure it gets adequate build-test coverage.
+#
+.if ${MACHINE_ARCH} == "mips64"
 SUBDIR=	beri
 .endif