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Several free-running counters for IIO uncore blocks are supported on
Sapphire Rapids server.

They are not enumerated in the discovery tables. Extend
generic_init_uncores() to support extra uncore types. The uncore types
for the free-running counters is inserted right after the uncore types
retrieved from the discovery table.

The number of the free-running counter boxes is calculated from the max
number of the corresponding standard boxes.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Link: https://lore.kernel.org/r/1625087320-194204-15-git-send-email-kan.liang@linux.intel.com