[llvm] [offload] allow h2h olMemcpy with a queue (PR #212757)

[Łukasz Plewa via llvm-commits]

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@@ -191,7 +191,7 @@ def olMemcpy : Function {
     let desc = "Enqueue a memcpy operation.";
     let details = [
         "For host pointers, use the host device belonging to the OL_PLATFORM_BACKEND_HOST platform.",
-        "If a queue is specified, at least one device must be a non-host device",
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lplewa wrote:

we lost information that we cannot do device to device cpy

https://github.com/llvm/llvm-project/pull/212757