sched/x86: Export 'percpu arch_freq_scale'

Commit:

  7bc2638 ("sched/topology: Consolidate and clean up access to a CPU's max compute capacity")

removed rq->cpu_capacity_orig in favor of using arch_scale_freq_capacity()
calls. Export the underlying percpu symbol on x86 so that external trace
point helper modules can be made to work again.

Signed-off-by: Phil Auld <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: auldp

arch/x86/kernel/cpu/aperfmperf.c

@@ -345,6 +345,7 @@ static DECLARE_WORK(disable_freq_invariance_work,
 		    disable_freq_invariance_workfn);
 
 DEFINE_PER_CPU(unsigned long, arch_freq_scale) = SCHED_CAPACITY_SCALE;
+EXPORT_PER_CPU_SYMBOL_GPL(arch_freq_scale);
 
 static void scale_freq_tick(u64 acnt, u64 mcnt)
 {