soc: qcom: add disable/enable SPSS SSR ioctl()

During SPSS firmware update by fota, SPSS SSR causes cryptographic erase
of Secure Processor user data. To mitigate this, instead of related
SSR, platform reboot requested during fota update. In the end of fota
update, SPSS SSR re-enabled.

This change adds ioctl() to update internal driver configuration
(functionally disable or enable SSR).

Change-Id: I1d8362b4691e1a335f7f1f29bc2358d3f9b1cb21
Signed-off-by: Konstantin Dorfman <kdorfman@codeaurora.org>
Signed-off-by: Nurit Lichtenstein <nuritl@codeaurora.org>