arm64: perf: Rename Cortex A57 events

arm64: perf: Rename Cortex A57 events

BugLink: http://bugs.launchpad.net/bugs/1559349
The implemented Cortex A57 events are strictly-speaking not
A57 specific. They are ARM recommended implementation defined events
and can be found on other ARMv8 SOCs like Cavium ThunderX too.

Therefore rename these events to allow using them in other
implementations too.

Signed-off-by: Jan Glauber <jglauber@cavium.com>
[will: capitalisation and ordering]
Signed-off-by: Will Deacon <will.deacon@arm.com>
(cherry picked from linux-next commit 5f140ccef3e1f15873c8e2c47d15b03099623ec0)
[dannf: offset adjustments]
Signed-off-by: dann frazier <dann.frazier@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>