msm: ais: sensor: validating the flash initialization parameters

Copying the flash initialization parameters from userspace memory to
kernel memory and in turn checking for the validity of the flash
initialization parameters pointer sent from userspace

Change-Id: I9ecd0a5d320a68ef23fb8dd0d4eaab7f7da5f729
CR fixed: 2059812
Signed-off-by: Rahul Sharma <sharah@codeaurora.org>
Signed-off-by: Andy Sun <bins@codeaurora.org>