[llvm] [RISCV] Move vector pseudo hasAllNBitUsers switch into RISCVBaseInfo.{h,cpp}. NFC (PR #67593)

[Philip Reames via llvm-commits]

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@@ -78,141 +78,6 @@ FunctionPass *llvm::createRISCVOptWInstrsPass() {
   return new RISCVOptWInstrs();
 }
 
-static bool vectorPseudoHasAllNBitUsers(const MachineOperand &UserOp,
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preames wrote:

Same here.

https://github.com/llvm/llvm-project/pull/67593