[llvm] [PowerPC] Add a set of extended mnemonics that are missing from Power 10. (PR #73003)

[Lei Huang via llvm-commits]

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@@ -53,8 +53,8 @@
               wait 4
 
 # CHECK: error: invalid operand for instruction
-# CHECK-NEXT: sync 4
-              sync 4
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lei137 wrote:

was this needed?

https://github.com/llvm/llvm-project/pull/73003