[clang] [RISCV] Make RequiredExtensions for intrinsics scalable to more than 32 extensions. NFC (PR #132895)

[Pengcheng Wang via cfe-commits]

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@@ -45,7 +45,7 @@ struct SemaRecord {
   unsigned Log2LMULMask;
 
   // Required extensions for this intrinsic.
-  uint32_t RequiredExtensions;
+  uint32_t RequiredExtensions[(RVV_REQ_Experimental + 31) / 32];
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wangpc-pp wrote:

RVV_REQ_Experimental->RVV_REQ_NUM?

https://github.com/llvm/llvm-project/pull/132895