irq: ratelimit is useless

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
Revert "arm: Use generic timer broadcast receiver"

This reverts commit 980910a896ee61e6ee1958cb5fcc1169b324918a.
Revert "ARM: 7536/1: smp: Formalize an IPI for wakeup"

This reverts commit fd294716eb703443c0761c8c90a04a7de943494d.