perf/x86/uncore: Correct the number of CHAs on SPR

perf/x86/uncore: Correct the number of CHAs on SPR

The number of CHAs from the discovery table on some SPR variants is
incorrect, because of a firmware issue. An accurate number can be read
from the MSR UNC_CBO_CONFIG.

Fixes: 949b11381f81 ("perf/x86/intel/uncore: Add Sapphire Rapids server CHA support")
Reported-by: Stephane Eranian <[email protected]>
Signed-off-by: Kan Liang <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Tested-by: Stephane Eranian <[email protected]>
Cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]