x86: Avoid kabi change caused by adding pkru element in thread_struct

category: bugfix
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I5RQLJ


CVE: NA

Intel-SIG: x86: Avoid kabi change caused by adding pkru element in thread_struct.

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Assuming that struct thread_struct won't be accessed directly by drivers,
Using KABI_BROKEN_INSERT macro to avoid kabi change caused by commit 9782a712
("x86/fpu: Add PKRU storage outside of task XSAVE buffer").

Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>
Signed-off-by: Lin Wang <lin.x.wang@intel.com>
Signed-off-by: Aichun Shi <aichun.shi@intel.com>