binman: ti-secure: Add support for TI signing

The ti-secure entry contains certificate for binaries that will be
loaded or booted by system firmware whereas the ti-secure-rom entry
contains certificate for binaries that will be booted by ROM. Support
for both these types of certificates is necessary for booting of K3
devices.

Reviewed-by: Simon Glass <sjg@chromium.org>
[vigneshr@ti.com: fixed inconsist cert generation by multiple packing]
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Neha Malcom Francis <n-francis@ti.com>
13 files changed