defconfig: msm: Enable SSBD config for Lito

Enable Speculative Store Bypass Disable config for Lito,
so that the mitigation can be used for its impacted cores.
Enabling this config is required, to ensure that PSTATE.SSBS
is set for EL0, so that speculation is enabled for it.

Change-Id: I6a872514784d4d412dc953ed5c903ab9ee8b47ed
Signed-off-by: Neeraj Upadhyay <neeraju@codeaurora.org>