[PowerPC] Exploit the vinsw, vinsd, and vins[wd][lr]x instructions on P10

This patch generates the vinsw, vinsd, vinsblx, vinshlx, vinswlx, vinsdlx,
vinsbrx, vinshrx, vinswrx and vinsdrx instructions for vector insertion on P10.

Differential Revision: https://reviews.llvm.org/D94454

GitOrigin-RevId: 34dc1ccb9606d1de7d4de7286fcc355fa8f7bcd7
5 files changed