qcom: scm: update function return value and input parameter type

Update the function return value and input scm_ret variable
type for restore secure configuration in scm_restore_sec_cfg() fn.
Adding scm_ret input variable for scm_get_feat_version() fn.  

Change-Id: Ideef914ded8dfdb4c780fd27d7273986eeb41f5c
Signed-off-by: Mohammed Khajapasha <mkhaja@codeaurora.org>