Intel FSP: add a shared set of functions for the FSP

- Move the non chipset-specific fsp pieces out of the chipset into a
shared area.  This is used by northbridge / southbrige / SOC code.  It
pulls in pieces from Kconfig, Makefile and FSP specific code.
- Enabled in the CPU code with a Kconfig "select PLATFORM_USES_FSP"

Change-Id: I7ffa934c1df09b71d48a876a56e3b888685870b8
Signed-off-by: Martin Roth <gaumless@gmail.com>
Signed-off-by: Martin Roth <martin.roth@se-eng.com>
Reviewed-on: http://review.coreboot.org/5635
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marc.jones@se-eng.com>
cougar_canyon2: Switch CPU/NB/SB to the shared FSP code

CPU - fsp_model_206ax:
- Remove Kconfig options and mark this as using the FSP.
- Use shared FSP cache_as_ram.inc file
Mainboard - intel/cougar_canyon2:
- Update to use the shared FSP header file.
- Modify to call copy_and_run() directly instead of returning to
cache_as_ram.inc.
Northbridge - fsp_sandybridge:
- remove mrccache, fsp_util.[ch]
- add fsp/chipset_fsp_util.[ch] with chipset specific FSP bits.
- Update to use the shared FSP header file.

These changes were validated with FSP:
CHIEFRIVER_FSP_GOLD_001_09-OCTOBER-2013.fd
SHA256: e1bbd614058675636ee45f8dc1a6dbf0e818bcdb32318b7f8d8b6ac0ce730801
MD5: 24965382fbb832f7b184d3f24157abda

Change-Id: Ibc52a78312c2fcbd1e632bc2484e4379a4f057d4
Signed-off-by: Martin Roth <gaumless@gmail.com>
Signed-off-by: Martin Roth <martin.roth@se-eng.com>
Reviewed-on: http://review.coreboot.org/5636
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marc.jones@se-eng.com>