syscalls/perf_event_open{01,02}: Fix KVM failures

HW events are not supported in KVM virtual machines and
perf_event_open() returns ENOENT.

This changes the testcases to report TCONF instead of failure if
particular events are unsupported.

It also adds two timer software configs to perf_event_open01 testcases
that works fine even in virtual machines.

Signed-off-by: Cyril Hrubis <chrubis@suse.cz>