boot_deps.h abstraction is lost

[phanikishoreg]

With recent developments in llbooter, boot_deps.h has not been well abstracted to maintain clear distinction between the llbooter.c and boot_deps.h.

We'd need to refactor the code to maintain the abstraction that boot_deps.h is intended to be. We'll need to talk about this after the deadline.

[Others]

@gparmer is rewriting the booter, hopefully this won't be a problem in the future