qseecom: Add SFAB clock voting.

Add SFAB voting in  QSEECOM_IOCTL_PERF_ENABLE_REQ.
The SFAB clock needs to be bumped up to its optimal
value when opearting in high bandwidth mode (for max
crypto performance)

Signed-off-by: Mona Hossain <mhossain@codeaurora.org>
(cherry picked from commit 8e2d73a0ade94ffd27882043d562c7ee825d9f7c)

Conflicts:

	drivers/misc/qseecom.c

Change-Id: I281e544756304f19969afbab7196a227dad0e2b1
Signed-off-by: Sudhir Sharma <sudsha@codeaurora.org>