b11580: hexagon: extend scalar DMA broadcasting support for binary ops (#30245)

• tests: cover weighted scalar broadcasts

Assisted-by: OpenCode

• ggml : support extended scalar DMA binary ops

Assisted-by: OpenCode

• hex-binary: remove all non-dma paths

• hex-binary: add support for non-contig strides and cleanup dma preable a bit

• hex-binary: cleanup the gating and simplify dma retry

• hex-geglu-erf: add a gate for F32 only, we dont support F16 for this op

• tests: cover weighted repeat broadcast

Assisted-by: OpenCode

• hex-binary: update REPEAT and COMPLEX kernels to use dma as well (missed them last time)

• hex-add-id: add dma support for src2 (idx)

Co-authored-by: Max Krasnyansky maxk@qti.qualcomm.com