ggml : fix row condition for i8mm kernels #10561
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fix #10487 (comment)
In multi-threaded matrix multiplications, the total number of rows could be divisible by 2 (which is required by the I8MM Arm kernels), but the rows processed by the individual thread could be odd. This can either cause out-of-bounds writes or incorrect results for
ne[2]*ne[3] > 1make -j && ./bin/test-backend-ops -o MUL_MAT -b CPU