test: bdinfo: Test both bdinfo and bdinfo -a

Factor out the core of test for all bdinfo output into bdinfo_test_all()
and then reuse it to verify that both 'bdinfo' and 'bdinfo -a' print all
the bdinfo output.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>