spi: Remove unneeded include of linux/workqueue.h

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

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

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

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

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

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

diff --cc drivers/spi/spi-omap-uwire.c
Simple merge

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

diff --cc drivers/spi/spi-s3c24xx.c
Simple merge

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

diff --cc drivers/spi/spi-sh-sci.c
Simple merge

diff --cc drivers/spi/spi-sun4i.c
Simple merge

diff --cc drivers/spi/spi-sun6i.c
Simple merge