The perf makefile is nicely complete except for

a) an uninstall option
b) a 'make help' description

This patch implements b)
it also comments out other non-working makefile targets
Signed-off-by: NJesse Brandeburg <jesse.brandeburg@intel.com>
LKML-Reference: <new-submission>
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>