Revert "ARM: net: JIT compiler for packet filters enabled by default"

This reverts commit e2029b0cf6fd822b67a5313496f3b42303fc67bf.
Revert "tick: Upstream fixes"

This reverts commit f535119f52fcee5045d50ca704632e437a17853e.
Revert "af_unix: speedup /proc/net/unix /proc/net/unix has quadratic behavior, and can hold unix_table_lock for a while if high number of unix sockets are alive. (90 ms for 200k sockets...)"

This reverts commit 1877c4498544a16a8fcae3bb9f969d07d0fdbaf7.
Revert "net: loopback: set default mtu to 64K"

This reverts commit a238470795c925c93c40cc02c7f22e67525b7d28.