cuda.bbclass: use 'cuda' override
cuda.bbclass: use 'cuda' override

for setting variables.  The python expressions previously
used did not interact well with BBCLASSEXTEND, causing
build failures that were difficult to work around.

(Fixes #45)

Signed-off-by: Matt Madison <1fa2ef4755a9226cb9a0a4840bd89b158ac71391@madison.systems>

madisongh/meta-tegra,madisongh/meta-tegra,madisongh/meta-tegra,madisongh/meta-tegra,madisongh/meta-tegra