opencl: add Adreno xmem SDPA path (#26331)
* opencl: add Adreno xmem SDPA path
Assisted-by: Codex
* Removed the Adreno-specific queue profiling override
* Clean up formatting
* 修复数值误差优化gqa/mask attn
Assisted-by: Codex
* add env GGML_OPENCL_XMEM_SDPA
Assisted-by: OpenAI Codex
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Co-authored-by: happyyzy <happyyzy@users.noreply.github.com>
