msm: wigig_sensing: initial commit of wigig_sensing SPI driver

This driver adds support for sensing use cases over 60GHz frequency band.
Sensing uses 60GHz radio signal to 'sense' the environment, allowing
various use cases such as proximity detection, face recognition, gesture
detection and more.

The driver communicates with the QCA6436 HW using SPI bus. The driver
requires SPI and wil6210 drivers to operate.

Change-Id: Ieaae89de8ef77617a24efafea0f476a3546cf27f
Signed-off-by: Gidon Studinski <gidons@codeaurora.org>