- Clang doesn't understand the -mno-thumb-interwork. Only use it with gcc.
- We need to add "-mllvm -arm-enable-ehabi" to clangs CFLAGS when
  generating the unwind tables to tell it to add the required directives to
  the assembly it generates.
Kill this, it's not needed at this point and (hopefully) the parent
has correctly locked the ic/vap.
Add __aeabi_memcpy to libkern as clang may generate calls to it.
Add another register definition bit - whether to populate EVM or PLCP
data in the RX status descriptor.

Obtained from:	Qualcomm Atheros
Fix a typo in DPADD.
Introduce vm_radix_is_empty(), and use it in place of
vm_object_cache_is_empty() where the caller is aware of the page cache's
implementation as a radix trie.

Sponsored by:	EMC / Isilon Storage Division
Finish portalfs removal.
Add more obsolete files.
Add 2 more obsolete files.
Correct a date, add an obsolete directory.
The kernel pmap is statically allocated, so there is really no need to
explicitly initialize its pm_root field to zero.

Sponsored by:	EMC / Isilon Storage Division
Bring back the comment on the sizing of the callout array that got
lost in r248031.

Requested by:	alc, alfred
Add three-stream EVM values.
Bump the EVM array size up to fit the AR9380 EVM entries.
Add a few new fields to the RX vendor radiotap header:

* a flags field that lets me know what's going on;
* the hardware ratecode, unmolested by conversion to a bitrate;
* the HAL rs_flags field, useful for debugging;
* specifically mark aggregate sub-frames.

This stuff sorely needs tidying up - it's missing some important
stuff (eg numdelims) and it would be nice to put the flags at the
beginning rather than at the end.

Tested:

* AR9380, STA mode, 2x2 HT40, monitoring RSSI and EVM values
Ports are no more exported via cvsup, remove cvsup examples and documentation refering to ports

MFC after:	2 days
MFC
Don't use an empty struct.
Reduce HPET eventtimer priority on systems with 8 or more cores.  Price of
the lock congestion may be too high there (2.5% on 4x4 core AMD Opteron).
Reinitialize eh after pfil(9) processing.

PR:		176764
Submitted by:	adri