[llvm] [AMDGPU] Remove VT helpers isFloatType, isPackedType, simplify isIntType (PR #77987)

[Jay Foad via llvm-commits]

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@@ -535,7 +535,7 @@ multiclass FLAT_Atomic_Pseudo_NO_RTN<
   ValueType vt,
   ValueType data_vt = vt,
   RegisterClass data_rc = vdst_rc,
-  bit isFP = isFloatType<data_vt>.ret,
+  bit isFP = data_vt.isFP,
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jayfoad wrote:

Can this be folded into its only use? Or if not, it should be a defvar instead of an argument. Same for the other instances in this file.

https://github.com/llvm/llvm-project/pull/77987