hexagon: optimize HMX matmul operations (llama/21071)

hexagon: optimize HMX matmul operations (llama/21071)

* optimize hmx_mat_mul functions by calculating row and column tiles upfront

* refactor core_dot_chunk_fp16 to use size_t for tile counts and improve readability

* wip

* set scale outside of loop

* wip

* refactor core_mma_chunk_fp16 and mat_mul_qk_0_d16a32 to use size_t for tile counts

* wip

* wip

* refactor transfer_output_chunk_fp16_to_fp32 to use size_t for dimensions

* refactor core_dot_chunk_fp16 to use size_t for tile row stride calculation

* wip

* refactor hmx_mat_mul functions to use hvx_vec_splat_f16 for column scales initialization

* refactor hmx_mat_mul_permuted_w16a32_batched to streamline scale setting and locking

* refactor core_dot_chunk_fp16 to improve tile stride calculations for output

* refactor hmx_mat_mul functions to use Q6_V_vsplat_R for column scales initialization

* fix compiling error

* wip

* optimize row and column tile indexing in core_mma_chunk_fp16 function

* wip

* Revert "wip"

This reverts commit cde679eff79c4a28dd2d89d32f710015e09592b6.

* Add size limit check for HAP_mmap in htp_iface_mmap and drop_mmap functions

* wip