qseecom: New cmd to support fuse writes

Add new command to support QFPROM writes. This operation
can no longer be performed from the Linux kernel.

Change-Id: Ifeb599b7019f8568ebbcfd7222f5c5ce11e9143b
Acked-by: Kaushik Sikdar <ksikdar@qti.qualcomm.com>
Signed-off-by: Gilad Avidov <gavidov@codeaurora.org>