[llvm] [MC] Rename PrivateGlobalPrefix to InternalSymbolPrefix. NFC (PR #185164)

[Alexander Richardson via llvm-commits]

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@@ -256,7 +256,7 @@ bool AArch64MCAsmInfoELF::evaluateAsRelocatableImpl(
 }
 
 AArch64MCAsmInfoMicrosoftCOFF::AArch64MCAsmInfoMicrosoftCOFF() {
-  PrivateGlobalPrefix = ".L";
+  InternalSymbolPrefix = ".L";
   PrivateLabelPrefix = ".L";
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arichardson wrote:

Are there any cases where these two differ? 

https://github.com/llvm/llvm-project/pull/185164