firmware: qcom-scm: Force built in drivers to depend on QCOM SCM

Some always built-in drivers have a dependency on QCOM SCM so don't enable
them if QCOM SCM is built as a module.

Change-Id: Ic0dedbad472d2a36220126db86d3fcbf817ce53d
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>