Implement pixel unshuffle block for lfm2vl#29

tdakhran wants to merge 1 commit intongxson:xsn/lfm2_vlngxson/llama.cpp:xsn/lfm2_vlfrom

Liquid4All:tarek/feat/pixel_unshuffle_blkLiquid4All/liquid_llama.cpp:tarek/feat/pixel_unshuffle_blkCopy head branch name to clipboard