Cleanup and update this driver to use the default master transfer queueing
mechanism provided by the core.

I've been carrying these changes locally to use as a basis for other SPI work.
Mark Brown pointed out that he's simply missed seeing it, Andy Shevchenko had
some minor comment's which I've now addressed. I'm just re-sending this on
Hartley Sweeten's behalf.

Changes in v3:
- add my sign-off to all the patches in this series

H Hartley Sweeten (7):
  spi: spi-ep93xx: remove io wrappers
  spi: spi-ep93xx: use 32-bit read/write for all registers
  spi: spi-ep93xx: add spi master prepare_transfer_hardware()
  spi: spi-ep93xx: absorb the interrupt enable/disable helpers
  spi: spi-ep93xx: pass the spi_master pointer around
  spi: spi-ep93xx: remove private data 'current_msg'
  spi: spi-ep93xx: use the default master transfer queueing mechanism

 drivers/spi/spi-ep93xx.c | 501 +++++++++++++++++------------------------------
 1 file changed, 177 insertions(+), 324 deletions(-)


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