perf/x86/intel/uncore: Support IIO free-running counters on GNR

perf/x86/intel/uncore: Support IIO free-running counters on GNR

The free-running counters for IIO uncore blocks on Granite Rapids are
similar to Sapphire Rapids. The key difference is the offset of the
registers. The number of the IIO uncore blocks can also be retrieved
from the discovery table.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Ammy Yi <ammy.yi@intel.com>
Link: https://lore.kernel.org/r/20231117163939.2468007-4-kan.liang@linux.intel.com