arm64: add dump instr before BUG in kernel

hulk inclusion
category: feature
bugzilla: 187058, https://gitee.com/openeuler/kernel/issues/I5ZUT5



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In case of debugging need when undefined instructin exception
occurs, we should dump regs and the undefined instruction
before BUG in kernel mode. Which is usually used to compare
with objdump instructions.

Signed-off-by: Chen Jiahao <chenjiahao16@huawei.com>
Reviewed-by: Zhang Jianhua <chris.zjh@huawei.com>
Reviewed-by: Liao Chang <liaochang1@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>