sw64: fix some structs related to pt_regs

Sunway inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5GF7A



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Because of previous modifications to struct pt_regs, this patch
fixes struct pt_regs_offset, dbg_reg_def and perf_event_sw64_regs
to keep them consistent.

Signed-off-by: He Chuyue <hechuyue@wxiat.com>

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