perf, x86: Implement 64 bit counter support for IBS

perf, x86: Implement 64 bit counter support for IBS

This patch implements 64 bit counter support for IBS. The sampling
period is no longer limited to the hw counter width.

The functions perf_event_set_period() and perf_event_try_update() can
be used as generic functions. They can replace similar code that is
duplicate across architectures.

V2: Added caps check for IBS_OP_CUR_CNT emulation.

Signed-off-by: Robert Richter <robert.richter@amd.com>