test: Wrap assert macros in ({ ... }) and fix missing semicolons

Wrap the assert macros in ({ ... }) so they can be safely used both as
right side argument as well as in conditionals without curly brackets
around them. In the process, find a bunch of missing semicolons, fix
them.

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