net: hns3: move dump regs function to a separate file

mainline inclusion
from mainline-v6.6-rc1
commit 939ccd10
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I7YRUW
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=939ccd107ffcade20c9c7055a2e7ae0fd724fb72



----------------------------------------------------------------------

The dump register function is being refactored.
The first step in refactoring is put the dump regs function
into a separate file.

Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jiantao Xiao <xiaojiantao1@h-partners.com>