SPI: spi_qsd: Add snapshot of SPI QSD driver

This change adds a snapshot of SPI QSD driver
from the 4.14 branch.
This is snapshot of the SPI QSD driver as of
msm-4.14 'commit 78bed541 ("Merge "msm:
camera: hyp: To fix Stack overflow"")'.

Change-Id: Ic6a9d304c3b828a06910400c947add85e1b7f762
Signed-off-by: Mukesh Kumar Savaliya <msavaliy@codeaurora.org>
Signed-off-by: Chetan C R <cchinnad@codeaurora.org>