zephyr: Remove leftover curly bracket
zephyr: Remove leftover curly bracket

I don't know how I missed this but there is a curly bracket I missed
to remove with the commit 40373bf93e90ab4.  Remove it.

Signed-off-by: Yasushi SHOJI <afa9ca3be149447780c2f7b524d61ed3d3db63f9@spacecubics.com>

libcsp/libcsp,libcsp/libcsp