KDE#385334
PPC64, vpermr, xxperm, xxpermr fix Iop_Perm8x16 selector field
PPC64, revert the change to vperm instruction.
KDE#385183
PPC64, Add support for xscmpeqdp, xscmpgtdp, xscmpgedp, xsmincdp instructions
PPC64, Fix bug in vperm instruction.
KDE#385210
PPC64, Re-implement the vpermr instruction using the Iop_Perm8x16.
KDE#385208
PPC64, Use the vperm code to implement the xxperm inst.
PPC64, Replace body of generate_store_FPRF with C helper function.
PPC64, Add support for the Data Stream Control Register (DSCR)
