build: implement --socs, --boards options
build: implement --socs, --boards options

This will restrict the build process to a subset of SoCs or boards,
which can be useful if you want to:

./build --boards seaboard build
./tegra-uboot-flasher exec seaboard

... in order to iterate testing on a single board at a time.

Signed-off-by: Stephen Warren <5ef2a23ba3aff51d1cfc8c113c1ec34b608b3b13@nvidia.com>

NVIDIA/tegra-uboot-flasher-scripts