bluetooth: Check FW status before downloading the firmware

As part of firmware download process, query the firmware for
the RamPatch and NVM download status. Download the firmware
only if the Firmware says they are not done.

CRs-Fixed: 667416
Change-Id: I842b527991c2e973a747c84a87a4e2bdbe7434b2
Signed-off-by: Anantha Krishnan <ananthk@codeaurora.org>