[llvm] [NFC][PowerPC] Use generic getImmEncoding function (PR #161567)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,h -- llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCCodeEmitter.cpp llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCCodeEmitter.h
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCCodeEmitter.cpp b/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCCodeEmitter.cpp
index a8e00198d..81d8e94b6 100644
--- a/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCCodeEmitter.cpp
+++ b/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCCodeEmitter.cpp
@@ -215,7 +215,7 @@ uint64_t PPCMCCodeEmitter::getImmEncoding(const MCInst &MI, unsigned OpNo,
   if (MO.isImm())
     return getMachineOpValue(MI, MO, Fixups, STI);
 
-  uint32_t Offset=0;
+  uint32_t Offset = 0;
   if (Fixup == PPC::fixup_ppc_half16)
     Offset = IsLittleEndian ? 0 : 2;
 

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https://github.com/llvm/llvm-project/pull/161567