hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5I72Q
CVE: NA

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1. Split sharepool normal area(8T) to sharepool readonly area(64G) and
sharepool normal area(8T - 64G)
2. User programs can not write to the address in sharepool readonly
   area.
3. Add SP_PROT_FOCUS for sp_alloc.
4. sp_alloc with SP_PROT_RO | SP_PROT_FOCUS returns the virtual address
   within sharepool readonly area.
5. Other user programs which add into task with write prot can not write
the address in sharepool readonly area.
Signed-off-by: NChen Jun <chenjun102@huawei.com>