[llvm] [NVPTX] Add prefetch tensormap variant (PR #146203)

[Durgadoss R via llvm-commits]

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@@ -746,33 +746,27 @@ foreach dim = [1, 2, 3, 4, 5] in {
 
 //Prefetch and Prefetchu 
 
-class PREFETCH_INTRS<string InstName> :
+class PREFETCH_INTRS<string InstName, string IntrName> :
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durga4github wrote:

looking at the usage below, having this as `Intrinsic Intr` would further simplify things?

https://github.com/llvm/llvm-project/pull/146203