Merge branch 'r8152-fixes'

Hayes Wang says:

====================
r8152: fix 2.5G devices

v3:
For patch #2, modify the comment.

v2:
For patch #1, Remove inline for fc_pause_on_auto() and fc_pause_off_auto(),
and update the commit message.

For patch #2, define the magic value for OCP register 0xa424.

v1:
These patches are used to fix some issues of RTL8156.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>