image_types_tegra.bbclass: add data partition support
image_types_tegra.bbclass: add data partition support

Provide a simpler mechanism for populating a data partition
by adding the variables IMAGE_TEGRAFLASH_DATA and DATAFILE.
When set, the data partition's filesystem image will be copied
from ${IMAGE_TEGRAFLASH_DATA} to ${DATAFILE} in the tegraflash
package.

This also uses the new --datafile option in the helper scripts
for handling the additional content appropriately.

Also ran an untabify pass over the entire bbclass, to clean
up some tabs that have wandered in from past commits.

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

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