[clang] [Clang][SME2] Fix PSEL builtin predicates (PR #77097)

[Kerry McLaughlin via cfe-commits]

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@@ -1952,10 +1952,6 @@ def SVPSEL_B : SInst<"svpsel_lane_b8",  "PPPm", "Pc", MergeNone, "", [IsStreamin
 def SVPSEL_H : SInst<"svpsel_lane_b16", "PPPm", "Ps", MergeNone, "", [IsStreamingCompatible], []>;
 def SVPSEL_S : SInst<"svpsel_lane_b32", "PPPm", "Pi", MergeNone, "", [IsStreamingCompatible], []>;
 def SVPSEL_D : SInst<"svpsel_lane_b64", "PPPm", "Pl", MergeNone, "", [IsStreamingCompatible], []>;
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kmclaughlin-arm wrote:

I think it should use `IsStreamingOrSVE2p1` in both cases.

https://github.com/llvm/llvm-project/pull/77097