[TF-A] Why is assembly macro used for registering multi-console driver?

Hi,

Probably, I should have asked this before pushing my code.

I have a question about finalize_console_register.

Platforms call console_*_register() from C code. I do not know why we need to fill the callbacks in the assembler macro, finalize_console_register.

We could call console_register() directly from C code, like this: https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/1426/3/plat/s...

Maybe, we may want to register the console so early in order to enable plat/common/aarch64/crash_console_helpers.S in the boot-up code?