nb/intel/nehalem: Rename to ironlake

The code is for Arrandale CPUs, whose System Agent is Ironlake.

This change simply replaces `nehalem` with `ironlake` and `NEHALEM`
with `IRONLAKE`. The remaining `Nehalem` cases are handled later, as
changing some of them would impact the resulting binary.

Tested with BUILD_TIMELESS=1 without adding the configuration options
into the binary, and packardbell/ms2290 does not change.

Change-Id: I8eb96eeb5e69f49150d47793b33e87b650c64acc
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38941
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/lenovo/t410/dsdt.asl b/src/mainboard/lenovo/t410/dsdt.asl
index 4f67bd8..f8e989a 100644
--- a/src/mainboard/lenovo/t410/dsdt.asl
+++ b/src/mainboard/lenovo/t410/dsdt.asl
@@ -45,7 +45,7 @@
 	Scope (\_SB) {
 		Device (PCI0)
 		{
-			#include <northbridge/intel/nehalem/acpi/nehalem.asl>
+			#include <northbridge/intel/ironlake/acpi/ironlake.asl>
 			#include <southbridge/intel/bd82x6x/acpi/pch.asl>
 
 			#include <drivers/intel/gma/acpi/default_brightness_levels.asl>