net: hns3: Support tlv in regs data for HNS3 VF driver

mainline inclusion
from mainline-v6.6-rc1
commit 3ef5d70b
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=3ef5d70b82ad5be1235e16318d9ab4f848a5bd68



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The dump register function is being refactored.
The third step in refactoring is to support tlv info in regs data for
HNS3 PF driver.

Currently, if we use "ethtool -d" to dump regs value,
the output is as follows:
  offset1: 00 01 02 03 04 05 ...
  offset2：10 11 12 13 14 15 ...
  ......

We can't get the value of a register directly.

This patch deletes the original separator information and
add tag_len_value information in regs data.
ethtool can parse register data in key-value format by -d command.

a patch will be added to the ethtool to parse regs data
in the following format:
  reg1 : value2
  reg2 : value2
  ......

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>