A final test with unmodified code has shown that a delay of 150ms
is not giving us a 100% success rate. Bump the delay to 200ms as
that seems to do the trick.

Note that during testing the delay was added to uart_bus_attach()
in uart_core.c. While having the delay in a different place can
change the behaviour, it was not expected. Having to bump the
delay with another 50ms could therefore be an indication that
the problem can not be solved with delays.

Reported by: kevlo@
Tested by: kevlo@
Pull in r189672 from upstream llvm trunk:

  InstCombine: Check for zero shift amounts before subtracting one
  causing integer overflow.

  PR17026. Also avoid undefined shifts and shift amounts larger than 64
  bits (those are always undef because we can't represent integer types
  that large).

This should fix assertion failures when building the emulators/xmame
port.

Reported by:	bapt
acpi_thermal: Warn about insane _TMP temperature only once

A warning is emitted again if the temperature became briefly valid
meanwhile. This avoids spamming the user when the sensor is broken.

Other values (ie. not _TMP) always raise a warning.
Style cleanups.
The pm_save should be cleared on the pmap initialization, and not on
the activation.

Noted by:	alc
Give the page allocations initiated by the swap-backed md(4) a higher
priority.  If the write is requested by a system daemon, sleeping
there would starve resources and cause deadlock.

Reported and tested by:	pho
Sponsored by:	The FreeBSD Foundation
sh: Use makename() where possible.
mdoc: add missing El.
    Add PCI bus space implementation that converts all 2 and 4 bytes
values to/from little endian according to PCI spec.
Add bpf(4) to config file to get dhclient working
sh: Separate out nbinary allocation into a function.
Add device PicoStation M2HP support.
This is a nice small outdoor/indoor AP from Ubiquity Networks.

The device has:
AR7241 CPU SoC
AR9287 Wifi
8MB flash
32MB RAM

wifi has been tested to work along with leds.

Submitted by:   loos
Approved by:    sbruno (mentor, implicit)
Tested by:      hiren
sh: Simplify list() in the parser.

The erflag argument was only used by old-style (``) command substitutions.
We can remove it and handle the special case in the command substitution
code.
    YAMON is 32-bit application and uses 32-bit pointers to pass kernel
arguments and environment names/values. Cast values to proper pointer type
to make MALTA kernel 64-bit compatible
- Set proper KERNLOADADDR
- Add bpf(4) required by dhclient
Sync USB bluetooth product list with Linux.

MFC after:	1 week
Fix a typo in a comment.
Unconditionally compile the __sync_* atomics support functions into compiler-rt
for ARM.
This is quite ugly, because it has to work around a clang bug that does not
allow built-in functions to be defined, even when they're ones that are
expected to be built as part of a library.

Reviewed by:	ed
Don't use _Unwind_Backtrace() on ARM as it's currently missing from our libgcc_s.  andrew@ has patches to add it, so this can be reverted and sync'd with upstream later.