bootrom-tools: fix regression by adding defaults to create-tftf
bootrom-tools: fix regression by adding defaults to create-tftf

There was no default firmware-package name or package type, and so the
create-tftf script was refusing to build TFTF packages.  Correct the
regression.

Testing Done: build nuttx TFTF package
Bug Number: Trivial
Review URL: https://reviews.leaflabs.com/r/2231/
Reviewed by: Morgan Girling <girling_morgan@projectara.com>, Jean Pihet <jean.pihet@newoldbits.com>

Signed-off-by: Eli Sennesh <5ebe47bba478951130dff4ea23416219c2dfa45d@leaflabs.com>

gregkh/bootrom-tools,projectara/bootrom-tools,projectara/bootrom-tools,gregkh/bootrom-tools,projectara/bootrom-tools,gregkh/bootrom-tools