spi: spi-fsl-dspi: Update DT binding documentation

DSPI driver has been updated and support more compatible strings.
This patch update the DT binding documentation.

Signed-off-by: Haikun Wang <haikun.wang@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Haikun Wang 2015-06-15 19:49:01 +08:00 • committed by Mark Brown
commit 812d6f6345