A few other common cases for encode-int decoding: OF_getencprop_alloc()
and OF_searchencprop(). I thought about using the element size parameter
to OF_getprop_alloc() to do endian-switching automatically, but it breaks
use with structs and a *lot* of FDT code (which can hopefully be moved to
these new APIs).

MFC after:	2 weeks
MFP4:
Change 221767 by rwatson@rwatson_zenith_cl_cam_ac_uk on 2013/02/05 14:18:53

        When printing out information on a TLB MOD exception for a user
        process (e.g., an attempt to write to a read-only page), report
        it as a "write" in the console message, rather than "unknown".

Change 221768 by rwatson@rwatson_zenith_cl_cam_ac_uk on 2013/02/05 14:28:00

        Fix post-compile but pre-commit typo in last changeset.

MFC after:	3 days
Sponsored by:	DARPA/AFRL
Allow users to set UUID in network byte order regardless of SMBIOS version.
Define BOOT_NETWORK_ENDIAN_UUID in make.conf(5) to enable this feature.
Try to make sure the frame is indeed in the kernel memory.
Typo fix.
- Use bus_dmamap_unload(), it is not optional.
- The new allocator won't return coherent memory for any size > PAGE_SIZE,
so don't assume we have coherent memory, and explicitely use
bus_dmamap_sync().
MFP4:
Change 221669 by bz@bz_zenith on 2013/02/01 12:26:04

        Run the initialization for polling earlier along with INTRs
        so that we can put network interface into polling mode by default
        if DEVICE_POLLING is compiled in and no interrupts are available.

MFC after:	3 days
Sponsored by:	DARPA/AFRL
MFP4: 1187103, 222076, 222057, 222051, 221799

Add atsectl, a simple utility to read and update MAC addresses stored in
the default flash location on Altera DE4 boards.  Typically used once
when setting up a board so leaving in tools rather than inflicting on
all users.

To build with world add LOCAL_DIRS=tools/tools/atsectl to the make
command line.

MFC after:	3 days
Sponsored by:	DARPA/AFRL