Add argument for firmware download ioctl control to
support SN100 chipsets.
Changes done for usage of dynamic buffer allocation
using kzalloc to make it DMAable.
Change-Id: Ib302638d72b5ecfbff70e3def3bc1e0e823f7e6c
Signed-off-by: Rohit Rangwani <rrangwan@codeaurora.org>