image_types_tegra.bbclass: add "bupgen" parameter to flash config generation
image_types_tegra.bbclass: add "bupgen" parameter to flash config generation

and remove any APPFILE references from the flash config for
BUP payload generation.  For some of the platforms, the NV
tools will try to access the files named in the
config file and will fail if they aren't present.

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

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