base: Clean up unneeded len() calls
This code pattern isn't very pythonic, improve it to drop the unneeded
len() calls.
Signed-off-by: 
Richard Purdie <richard.purdie@linuxfoundation.org>
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This code pattern isn't very pythonic, improve it to drop the unneeded
len() calls.
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>