sw64: reimplement die_if_kernel()

Sunway inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I56OLG



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In the original implementation, incorrent printing may occur when
multiple processes die at the same time. To fix this, we use lock.

Signed-off-by: Wu Liliu <wuliliu@wxiat.com>
Signed-off-by: Gu Zitao <guzitao@wxiat.com>