Fix the wrong stride for TIMD
Fix the wrong stride for TIMD, which only affects the cost calculation for Horizontal mode during TIMD. No impact on coding performance and running time. AI: {0.00%, 0.00%, 0.00%; 99%, 96%}; RA: {0.00%, 0.00%, 0.00%; 100%, 98%}; LDB: {0.00%, 0.00%, 0.00%; 99%, 97%}