net: stmmac: Stop using hard-coded callbacks

This a starting point for a cleanup and re-organization of stmmac.

In this series we stop using hard-coded callbacks along the code and use instead helpers which are defined in a single place ("hwif.h").

This brings several advantages:
1) Less typing :)
2) Guaranteed function pointer check
3) More flexibility

By 2) we stop using the repeated pattern of:

	if (priv->hw->mac->some_func)
		priv->hw->mac->some_func(...)

I didn't check but I expect the final .ko will be bigger with this series because *all* of function pointers are checked.

Anyway, I hope this can make the code more readable and more flexible now.

Jose Abreu (5):
net: stmmac: Switch stmmac_desc_ops to generic HW Interface Helpers
net: stmmac: Switch stmmac_dma_ops to generic HW Interface Helpers
net: stmmac: Switch stmmac_ops to generic HW Interface Helpers
net: stmmac: Switch stmmac_hwtimestamp to generic HW Interface Helpers
net: stmmac: Switch stmmac_mode_ops to generic HW Interface Helpers

 drivers/net/ethernet/stmicro/stmmac/chain_mode.c   |  34 +-
 drivers/net/ethernet/stmicro/stmmac/common.h       | 199 +---------
 drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c |   4 +-
 drivers/net/ethernet/stmicro/stmmac/dwmac5.c       |  19 +-
 drivers/net/ethernet/stmicro/stmmac/dwmac5.h       |   6 +-
 drivers/net/ethernet/stmicro/stmmac/enh_desc.c     |   4 +-
 drivers/net/ethernet/stmicro/stmmac/hwif.h         | 421 ++++++++++++++++++++
 drivers/net/ethernet/stmicro/stmmac/norm_desc.c    |   4 +-
 drivers/net/ethernet/stmicro/stmmac/ring_mode.c    |  39 +-
 .../net/ethernet/stmicro/stmmac/stmmac_ethtool.c   |  82 ++--
 .../net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c  |  34 +-
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c  | 439 +++++++++------------
 drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c   |  18 +-
 13 files changed, 726 insertions(+), 577 deletions(-)
 create mode 100644 drivers/net/ethernet/stmicro/stmmac/hwif.h

2.9.3