[llvm] [Hexagon] Fix typos discovered by codespell (NFC) (PR #126233)

[Sudharsan Veeravalli via llvm-commits]

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@@ -74,7 +74,7 @@ static cl::opt<bool> WarnSignedMismatch(
     cl::init(false));
 static cl::opt<bool> WarnNoncontigiousRegister(
     "mwarn-noncontigious-register",
-    cl::desc("Warn for register names that arent contigious"), cl::init(true));
+    cl::desc("Warn for register names that aren't contigious"), cl::init(true));
 static cl::opt<bool> ErrorNoncontigiousRegister(
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svs-quic wrote:

I had left out contigious since it is also a part of the variable name.  Wasn't sure if we wanted to make changes to variable names. 

--ignore-words-list=CarryIn,CreateOr,ORE,COPYs,ArchVer,predicable,UE,MIs,isNT,Vor,CountR,DUM,GEs,AddD,ToI, \
     CopyIn,TheI,TotalIn,vor,MOne,**contigious,Contigious** 

https://github.com/llvm/llvm-project/pull/126233