WIP: Signing TI x509 certificates using binman

[Neha Malcom Francis]

Hi Simon,

Before I roll out the entire series that works for packaging K3 
bootloader images, wanted to get some reviews and comments regarding the 
implementation of the signing etype [1] . I believe I've taken into 
consideration what we've discussed earlier [2].

Let me know your thoughts. The tree is also WIP, and was mainly designed 
for testing the signing etype on two of the devices. I will add the 
remaining and refine the series based on the next comments.

[1] 
https://github.com/nehamalcom/u-boot/commit/ea7413ed5864340bd6f01e704e8bdcc073a7896b#diff-efb03d61a324724c4f86bf42b45c4e4e614cab18e1b3184f63721d62280a11b5

[2] 
https://patchwork.ozlabs.org/project/uboot/patch/20230224120340.587786-1-n-francis@ti.com/

-- 
Thanking You
Neha Malcom Francis