ggml-hexagon: gelu operation (#17921)
* feat: inital support for gelu using sigmoid approximation
* snapshot: faster gelu using polynomial approximation
* test: disable l2-block prefetch in polynomail approximation
* Revert "test: disable l2-block prefetch in polynomail approximation"
This reverts commit 72339994d45b2bed887e79994403c378d90b62b5.
* Revert "snapshot: faster gelu using polynomial approximation"
This reverts commit 2a787a61d11f9e63e5943a2e6d134b2f0c402ace.
* debug: temporarily disable unnecessary log message for debug purpose
* Feat: optiized unaligned sigmoid_f32
* Feat: larger l2prefetch block
* feat: apply unaligned-load optimization on mul and mul_scalar
* Revert "debug: temporarily disable unnecessary log message for debug purpose"
This reverts commit 84f2f23aa9f17e2fa826db969cd825d0ab192995.
* refactor: cleanup commented unused code
* chore: reformat code with clang-formatter to pass cli test
* Revert "chore: reformat code with clang-formatter to pass cli test"
This reverts commit 952877ec24732b12010c7fa7ed3fc8de4b74e718.
* fix: fix loop overflow
* chore: fix formating ci error
