[llvm] [GlobalISel] Fix volatile flag handling in memmove legalizer (PR #206025)

[Cullen Rhodes via llvm-commits]

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@@ -2099,42 +2099,34 @@ entry:
 define void @memmove_7_volatile(ptr %dst, ptr %src, i32 %value) {
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c-rhodes wrote:

it's the above test that's volatile, names need reversing

https://github.com/llvm/llvm-project/pull/206025