qcom: scm_qcpe: 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: I5fff488f973b018f898eef616801a4b5e5a900fb
Signed-off-by: Zhiqiang Tu <ztu@codeaurora.org>