musa: Upgrade MUSA SDK version to rc4.0.1 and use mudnn::Unary::IDENTITY op to accele...

musa: Upgrade MUSA SDK version to rc4.0.1 and use mudnn::Unary::IDENTITY op to accelerate D2D memory copy (llama/13647)

* musa: fix build warning (unused parameter)

Signed-off-by: Xiaodong Ye <redacted>
* musa: upgrade MUSA SDK version to rc4.0.1

Signed-off-by: Xiaodong Ye <redacted>
* musa: use mudnn::Unary::IDENTITY op to accelerate D2D memory copy

Signed-off-by: Xiaodong Ye <redacted>
* Update src/ggml-cuda/cpy.cu

Co-authored-by: Johannes Gäßler <redacted>
* musa: remove MUDNN_CHECK_GEN and use CUDA_CHECK_GEN instead in MUDNN_CHECK

Signed-off-by: Xiaodong Ye <redacted>
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Signed-off-by: Xiaodong Ye <redacted>
Co-authored-by: Johannes Gäßler <redacted>