Revert "Input: Send events one packet at a time"

This reverts commit 43ea1574e94a202119b695041d26e696109fdf79.
Kernel Version: ak.691.422.Pirates
Revert "mm.h: set VM_MAX_READAHEAD 1024 - VM_MIN_READAHEAD 64"

This reverts commit 4414ae35a9e5f36e883f4fd09dc36b10f742745e.