[llvm] [RISCV] Add missing RISCVMaskedPseudo for TIED pseudos (PR #86787)

[via llvm-commits]

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@@ -1192,11 +1192,8 @@ define <vscale x 2 x i32> @vmerge_larger_vl_false_becomes_tail(<vscale x 2 x i32
 define <vscale x 2 x i64> @vpmerge_vwsub.w_tied(<vscale x 2 x i64> %passthru, <vscale x 2 x i64> %x, <vscale x 2 x i32> %y, <vscale x 2 x i1> %mask, i32 zeroext %vl) {
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sun-jacobi wrote:

Might not related to this patch but is the `%x` necessary here?

https://github.com/llvm/llvm-project/pull/86787