* CUDA: remove -sm row, refactor cuBLAS * fix CDNA + BF16 logic * fix bad return * fix src0 strides, contiguous requirements * fix GGML_CUDA_FORCE_CUBLAS * fix casts to BF16
* CUDA: remove -sm row, refactor cuBLAS * fix CDNA + BF16 logic * fix bad return * fix src0 strides, contiguous requirements * fix GGML_CUDA_FORCE_CUBLAS * fix casts to BF16