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>
diff --git a/src/northbridge/intel/gm45/Kconfig b/src/northbridge/intel/gm45/Kconfig
index e7b9603..ef6b4ef 100644
--- a/src/northbridge/intel/gm45/Kconfig
+++ b/src/northbridge/intel/gm45/Kconfig
@@ -29,6 +29,7 @@
 	select POSTCAR_STAGE
 	select POSTCAR_CONSOLE
 	select SMM_TSEG
+	select PARALLEL_MP
 
 config CBFS_SIZE
 	hex