Correctly import, and inherit functions, and variables.
Also fix some typos and remove some Python 2 code that isn't recognised.
(Bitbake rev: b0c807be5c2170c9481c1a04d4c11972135d7dc5)
Signed-off-by: Frazer Clews <frazerleslieclews@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>