spi: convert drivers to use bits_per_word_mask

Fill in the recently added spi_master.bits_per_word_mask field in as
many drivers as possible. Make related cleanups, such as removing any
redundant error-checking, or empty setup callbacks.

Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --cc drivers/spi/spi-altera.c
Simple merge

diff --cc drivers/spi/spi-ath79.c
Simple merge

diff --cc drivers/spi/spi-atmel.c
Simple merge

diff --cc drivers/spi/spi-au1550.c
Simple merge

diff --cc drivers/spi/spi-bcm63xx.c
Simple merge

diff --cc drivers/spi/spi-bfin-sport.c
Simple merge

diff --cc drivers/spi/spi-bfin5xx.c
Simple merge

diff --cc drivers/spi/spi-clps711x.c
Simple merge

diff --cc drivers/spi/spi-coldfire-qspi.c
Simple merge

diff --cc drivers/spi/spi-davinci.c
Simple merge

diff --cc drivers/spi/spi-dw.c
Simple merge

diff --cc drivers/spi/spi-ep93xx.c
Simple merge

diff --cc drivers/spi/spi-fsl-espi.c
Simple merge

diff --cc drivers/spi/spi-gpio.c
Simple merge

diff --cc drivers/spi/spi-imx.c
Simple merge

diff --cc drivers/spi/spi-mxs.c
Simple merge

diff --cc drivers/spi/spi-nuc900.c
Simple merge

diff --cc drivers/spi/spi-omap-100k.c
Simple merge

diff --cc drivers/spi/spi-omap2-mcspi.c
Simple merge

diff --cc drivers/spi/spi-ppc4xx.c
Simple merge

diff --cc drivers/spi/spi-pxa2xx.c
Simple merge

diff --cc drivers/spi/spi-s3c64xx.c
Simple merge

diff --cc drivers/spi/spi-sirf.c
Simple merge

diff --cc drivers/spi/spi-ti-ssp.c
Simple merge

diff --cc drivers/spi/spi-topcliff-pch.c
Simple merge

diff --cc drivers/spi/spi-txx9.c
Simple merge

diff --cc drivers/spi/spi-xcomm.c
Simple merge

diff --cc drivers/spi/spi-xilinx.c
Simple merge