sdm429w: Add interface to load BG with TWM firmware

Load BG with TWM firmware image before enter TWM.
Add interface to load diffrent BG firmware based on the
command.

Change-Id: Id7aef89735d7591b4810011dea5a3483cbb97028
Signed-off-by: Ajit Kumar <kajit@codeaurora.org>
2 files changed