nb/intel/gm45: Use parallel MP init

This places the parallel mp ops up in the model_1067x dir and is
included from other Intel core2 CPU dirs that can use the same code.

Tested on Thinkpad X200 on which boot time is reduced by ~35ms.

Change-Id: Iac416f671407246ee223075eee1aff511e612889
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/23434
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/southbridge/intel/i82801ix/lpc.c

@@ -393,7 +393,8 @@ static void i82801ix_lock_smm(struct device *dev)
 	/* Don't allow evil boot loaders, kernels, or
 	 * userspace applications to deceive us:
 	 */
-	smm_lock();
+	if (!IS_ENABLED(CONFIG_PARALLEL_MP))
+		smm_lock();
 
 #if TEST_SMM_FLASH_LOCKDOWN
 	/* Now try this: */