NFC: Add support for SN100 and use dynamic buffer

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>