x86/resctrl: Export the is_mbm_*_enabled() helpers to asm/resctrl.h

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



---------------------------

The architecture specific parts of resctrl have helpers to hide accesses
to the rdt_mon_features bitmap.

To ease moving the filesystem parts of the code out to /fs/, give these
a resctrl_arch prefix. Move is_mbm_event() and is_mbm_enabled() into the
only file that uses them.

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