Revert "fs: rwsem backporting"

This reverts commit 31ad012e402bcb89bca826f2a14494cded2b9aa6.
Revert "vfs: optimize inode cache access patterns"

This reverts commit 34e6d550868148a12f4b3687c5e3c45a04252b3f.
makefile: add config for graphite optimizations (synergydev)

makefile: add link-time optimization (synergydev)