[llvm] [X86][MC] Support Enc/Dec for EGPR for promoted AMX-TILE instruction (PR #76210)

[Phoebe Wang via llvm-commits]

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@@ -0,0 +1,6 @@
+# RUN: llvm-mc --disassemble %s -triple=x86_64 | FileCheck %s --check-prefixes=ATT
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phoebewang wrote:

I still think file/instruction brings too much files, can we organize in CPUID of being promoted instructions, e.g., amx-tile.txt?

https://github.com/llvm/llvm-project/pull/76210