spi: Add Spreadtrum ADI controller documentation

This patch adds the binding documentation for Spreadtrum ADI
controller device.

Signed-off-by: Baolin Wang <baolin.wang@spreadtrum.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Baolin Wang 2017-09-15 15:29:15 +08:00 • committed by Mark Brown
commit 2f329595b8