kabi: Add reserved page and gfp flags for future extension

euleros inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4OELI


CVE: NA

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24 page flags are used in 32-bit architectures and 27 page flags are
used in 64-bit ones currently.  And 23 gfp flags are used currently.
Add 2 reserved page and gfp flags for internal extension.  For the
new flags which backported from kernel upstream, place them behind the
reserved flags.

Signed-off-by: Peng Liang <liangpeng10@huawei.com>
Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>