[PATCH 5/5] perf: Create a sysfs entry for Power event format

Create a sysfs entry, '/sys/bus/event_source/devices/cpu/format/event' which describes the format of a POWER cpu. The format of the event is the same for all POWER cpus at least in (Power6, Power7), so bulk of this change is common in the code common to POWER cpus. This code is based on

[PATCH 5/5] perf: Create a sysfs entry for Power event format

Create a sysfs entry, '/sys/bus/event_source/devices/cpu/format/event' which describes the format of a POWER cpu. The format of the event is the same for all POWER cpus at least in (Power6, Power7), so bulk of this change is common in the code common to POWER cpus. This code is based on