Issues found PVS studio static analyzer. PPCISelLowering.cpp

[Seraphimt]

Main issue:
#169959
2. Change logic by copy-past error. The PVS-Studio warning: V501 There are identical sub-expressions to the left and to the right of the '==' operator: PeekArg.getValNo() == PeekArg.getValNo() PPCISelLowering.cpp 7865

[llvmbot]

@llvm/issue-subscribers-backend-powerpc

Author: None (Seraphimt)

Main issue: https://github.com//issues/169959 2. Change logic by copy-past error. The PVS-Studio warning: V501 There are identical sub-expressions to the left and to the right of the '==' operator: PeekArg.getValNo() == PeekArg.getValNo() PPCISelLowering.cpp 7865