spi: core: Use list_first_entry_or_null() instead of open-coded

Use list_first_entry_or_null() to save a few lines.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Axel Lin 2014-01-02 15:16:40 +08:00 • committed by Mark Brown
commit 1cfd97f93e