spi: loopback-test: test zero-length transfer

In order to test various spi_messages including zero-length transfer,
this adds zero length into the iterate_len list.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Akinobu Mita 2017-03-18 03:17:29 +09:00 • committed by Mark Brown
commit 0bd7fda56b