opencl: refactor q8_0 set_tensor and mul_mat host side dispatch for Adreno#21938

lhez merged 3 commits intoggml-org:masterggml-org/llama.cpp:masterfrom

qualcomm:lh/q8_0-mm-host-refactorqualcomm/llama.cpp:lh/q8_0-mm-host-refactorCopy head branch name to clipboard