hexagon: add support for SSM_SCAN op (#31921)
* hexagon: add SSM_SCAN Op support
* hex-ssm-scan: fix multi-device spliting
* hex-ssm-scan: remove redundant checks and make kernel use host config
* hex-ssm-scan: remove direct ddr access
* hex-ssm-scan: remove DMA ordering
* hex-ops: update supported ops
* hex-ssm-scan: rewrite the dma pipeline to match other ops (dbl.buf, etc)
* hex-ssm-scan: remove all fallbacks, only dma/vtcm paths
* hex-ssm-scan: add kernel_type to kparams and remove redundant recomputes
* hex-ssm-scan: avoid stalls in the overall pipeline (dma flush between chunks)
* hex-ssm-scan: vectorize softplus
* hex-ssm-scan: optimize hvx loops
* hex-ssm-scan: add HMX support
* hex-ssm-scan: add support for GGML_HEXAGON_SSM_SELECT
* hex-ssm-scan: cleanup kernel names
* hex-ssm-scan: simplify mdev checks
* hex-mdev: improve mdev row-split solver
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Co-authored-by: Max Krasnyansky <maxk@qti.qualcomm.com>
