soc/intel/common: Add common reset code

soc/intel/common: Add common reset code

Move reset support into the Intel common branch.  Prevent breaking of
existing platforms by using a Kconfig value to select use of the common
reset code.

BRANCH=none
BUG=None
TEST=Build and run on Glados

Change-Id: I5ba86ef585dde3ef4ecdcc198ab615b5c056d985
Signed-off-by: Stefan Reinauer <reinauer@chromium.org>
Original-Commit-Id: 85d8a6d9628a66cc8d73176d460cd6c5bf6bd6b2
Original-Change-Id: I5048ccf3eb593d59301ad8e808c4e281b9a0aa98
Original-Signed-off-by: Lee Leahy <Leroy.P.Leahy@intel.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/248301
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Commit-Queue: Leroy P Leahy <leroy.p.leahy@intel.com>
Original-Tested-by: Leroy P Leahy <leroy.p.leahy@intel.com>
Reviewed-on: http://review.coreboot.org/9505
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>