[PATCHv2] arm: perf: Add event descriptions

[Drew Richardson]

On Fri, Oct 09, 2015 at 03:13:38AM -0700, Will Deacon wrote:
> Also, would you be able to do something similar for AArch64 too, please?
> (take a look at our for-next/core branch for the latest perf changes).

Here are some almost identical patches for AArch64 based on arm64
tree's for-next/core branch. Please note that this is dependent on
some change to drivers/perf/arm_pmu.c so that pmu.attr_groups is
preserved.

Drew