x86/Kconfig: allow NODES_SHIFT to be set on MAXSMP

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8UT5S


CVE: NA

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Allow to set NODES_SHIFT to [8, 10] on MAXSMP.

Signed-off-by: Liu Shixin <liushixin2@huanwei.com>