Consistently use "cpu_flags" as variable/parameter name for CPU flags
Merge remote-tracking branch 'qatar/master'

* qatar/master:
  Consistently use "cpu_flags" as variable/parameter name for CPU flags

Conflicts:
	libavcodec/x86/dsputil_init.c
	libavcodec/x86/h264dsp_init.c
	libavcodec/x86/hpeldsp_init.c
	libavcodec/x86/motion_est.c
	libavcodec/x86/mpegvideo.c
	libavcodec/x86/proresdsp_init.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
lavf/riff: Add ITRK tag

Some players, like foobar2000 or modern versions of WMP, create WAV
files using the ITRK tag for track instead of IPRT

Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>