unit: Fixup crc unit test for zassert change

We renamed ztest's assert to zassert and the crc test case wasn't
updated to match so it doesn't build.

Change-Id: I67cd5bb6eef0875f31b8825d5c3aa5e1fa46af04
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
1 file changed