[llvm] [TableGen] fix tlbgen for EncodingByHwMode (PR #84906)

[Krzysztof Parzyszek via llvm-commits]

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@@ -76,10 +74,8 @@ let OutOperandList = (outs) in {
     let AsmString = "foo  $factor";
   }
 
-  // Encoding not overridden, different namespace:
-  // In the default case, this instruction is duplicated into two Alt decoder
-  // tables (ModeA and ModeB).
-  // In the suppressed case, this instruction appears in a single decoder table.
+  // Instructions whose DecoderNamespace dosen't contain valid
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kparzysz wrote:

Typo: dosen't -> doesn't.

https://github.com/llvm/llvm-project/pull/84906