Merge branch 'stmmac-dwmac-mediatec-clock-fix'

Biao Huang says:

====================
stmmac: dwmac-mediatek: fix clock issue

changes in v5:
1. add reivewd-by as Matthias's comments.
2. fix "warning: unused variable 'ret' [-Wunused-variable]" as Jakub's comments

changes in v4:
1. improve commit message and test ko insertion/remove as Matthias's comments.
2. add patch "net: stmmac: fix pm runtime issue in stmmac_dvr_remove()" to
   fix vlan filter deletion issue.
3. add patch "net: stmmac: fix unbalanced ptp clock issue in suspend/resume flow"
   to fix unbalanced ptp clock issue in suspend/resume flow.

changes in v3:
1. delete mediatek_dwmac_exit() since there is no operation in it,
as Matthias's comments.

changes in v2:
1. clock configuration is still needed in probe,
and invoke mediatek_dwmac_clks_config() instead.
2. update commit message.

v1:
remove duplicated clock configuration in init/exit.
====================

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