intel: Refactor common platform code [4/5]

Pull out SiP & PSCI service driver into socfpga common directory.
Remove deassert_peripheral_reset from cold reset procedure as it is not
needed.

Signed-off-by: Hadi Asyrafi <muhammad.hadi.asyrafi.abdul.halim@intel.com>
Change-Id: I1a0390fca6db4c89919a2a038de2a9d96c3ae4fd
4 files changed