fs/resctrl: Remove the limit on the number of CLOSID

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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At the moment, number of resource control group (user can create) is
limited to 32. Remove the limit.

ffs() returns '1' for bit 0, hence the existing code subtracts 1 from
the index to get the CLOSID value. find_first_bit() returns the bit
number which does not need adjusting.

Signed-off-by: Amit Singh Tomar <amitsinght@marvell.com>
[ morse: fixed the off-by-one in the allocator and the wrong
  not-found value. Removed the limit. ]
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Zeng Heng <zengheng4@huawei.com>