livepatch/arm: fix incorrect stack detection

hulk inclusion
category: bugfix
bugzilla: 185757 https://gitee.com/openeuler/kernel/issues/I4DDEL



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During the test, it is found that the running function to be patched
is not detected when enabling the livepatch. It will cause unkown
problems.

The cause is that the return value of the klp_check_jump_func() is
incorrect. To solve the problem, reverse the return value.

Signed-off-by: Ye Weihua <yeweihua4@huawei.com>
Reviewed-by: Kuohai Xu <xukuohai@huawei.com>

Signed-off-by: Chen Jun <chenjun102@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>