n4.2.11
swscale/ppc: Move VSX-using code to its own file
swscale: Add support for NV24 and NV42
swscale/ppc: Add av_unused to template vars only used in one includer
Merge commit '0f40c9098498ad90dbbd2380eb4269015e84bde4'
Merge remote-tracking branch 'qatar/master'
ppc: don't return a value from a function declared void