arm_mpam: resctrl: Add dummy definition for free running counters

maillist inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8T2RT

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git/log/?h=mpam/snapshot/v6.7-rc2



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resctrl expects RDT like counters that are free running. MPAM's counters
don't behave like this as they need a monitor to be allocated first.

Provide the helper that says whether free running counters are supported.

Subsequent patches will make this more intelligent.

Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Zeng Heng <zengheng4@huawei.com>