Pull up following revision(s) (requested by jmcneill in ticket #249):
	sys/modules/pad/Makefile: revision 1.2
	sys/arch/arm/allwinner/awin_hdmiaudio.c: revision 1.5
	sys/dev/pad/pad.c: revision 1.22
	sys/dev/pad/padvol.c: file removal
	sys/dev/pad/files.pad: revision 1.5
	sys/dev/auvolconv.c: revision 1.1
	sys/dev/pad/padvol.h: file removal
	sys/dev/audio.c: revision 1.266
	sys/dev/files.audio: revision 1.3 (via patch: sys/conf/files)
	sys/dev/auvolconv.h: revision 1.1
	sys/dev/pad/padvar.h: revision 1.5
	sys/dev/audio_if.h: revision 1.70
	sys/arch/arm/allwinner/files.awin: revision 1.26
Add common audio converters for software volume control. Only supports
slinear16_le and slinear16_be for now.
Convert pad(4) and awin_hdmiaudio to use the new converters.
Pull up following revision(s) (requested by manu in ticket #254):
	sys/ufs/ufs/ufs_extattr.c: revision 1.46
Fix uninitialized mutex usage
We use extended attribute mount mutex before testing if it had been
initialized, and as reported by Christos,  this caused panic with
LOCKDEBUG. Fix it by testing before using.
Pull up following revision(s) (requested by jmcneill in ticket #255):
	sys/dev/i2c/axp22x.c: revision 1.2
Change internal temperature base from -267.7C to -243.7C. The AXP223
datasheet says that the value is between -267.7C and 165.8C in steps of 0.1C,
but this doesn't make sense for a 12-bit field. If we take the maximum value
and subtract 4095 we get -243.7C, effectively adding +24C to the reported
temp. On my A31 board, this changes a chilly 15.3C to a more reasonable 39.3C.
Pull up following revision(s) (requested by jmcneill in ticket #256):
	sys/dev/auvolconv.c: revision 1.2
When this code was split from dev/pad, the "volume" member size was changed
from u_int to uint8_t. This had the unfortunate side-effect of introducing
an integer overflow when adjusting samples as the largest type used was now
int16_t. This change copies the volume level to a temporary u_int and uses
that in the calculation. Fixes recent failures with the
dev/audio/t_pad/pad_output test.
Tickets #249, #254, #255, #256