msm: camera: kconfig: Add support for face detection driver

Kconfig support for Face Detection (MSM_FD) driver.
Its purpose is to detect faces from given input buffer.

Change-Id: I1b38892e870441790f253b54b5fd72809a8c3823
Signed-off-by: Gjorgji Rosikopulos <grosik@codeaurora.org>