On umount(), resctrl resets each resource back to its default
configuration. It only ever does this for all resources in one go.
reset_all_ctrls() is architecture specific as it works with struct
rdt_hw_resource.
Make reset_all_ctrls() an arch helper that resets one resource.
Signed-off-by: James Morse <james.morse@xxxxxxx>
Reviewed-by: Tony Luck <tony.luck@xxxxxxxxx>
Reviewed-by: Reinette Chatre <reinette.chatre@xxxxxxxxx>