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

[Jay Foad via llvm-commits]

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@@ -805,7 +805,7 @@ multiclass MUBUF_Pseudo_Atomics_RTN <string opName,
                                      RegisterClass vdataClass,
                                      ValueType vdataType,
                                      SDPatternOperator atomic,
-                                     bit isFP = isFloatType<vdataType>.ret> {
+                                     bit isFP = vdataType.isFP> {
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jayfoad wrote:

Same.

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