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/northbridge/intel/ironlake/chip.h b/src/northbridge/intel/ironlake/chip.h
new file mode 100644
index 0000000..dad03da
--- /dev/null
+++ b/src/northbridge/intel/ironlake/chip.h
@@ -0,0 +1,51 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007-2008 coresystems GmbH
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef NORTHBRIDGE_INTEL_IRONLAKE_CHIP_H
+#define NORTHBRIDGE_INTEL_IRONLAKE_CHIP_H
+
+#include <drivers/intel/gma/i915.h>
+
+/*
+ * Digital Port Hotplug Enable:
+ *  0x04 = Enabled, 2ms short pulse
+ *  0x05 = Enabled, 4.5ms short pulse
+ *  0x06 = Enabled, 6ms short pulse
+ *  0x07 = Enabled, 100ms short pulse
+ */
+struct northbridge_intel_ironlake_config {
+	u8 gpu_dp_b_hotplug; /* Digital Port B Hotplug Config */
+	u8 gpu_dp_c_hotplug; /* Digital Port C Hotplug Config */
+	u8 gpu_dp_d_hotplug; /* Digital Port D Hotplug Config */
+
+	u8 gpu_panel_port_select; /* 0=LVDS 1=DP_B 2=DP_C 3=DP_D */
+	u8 gpu_panel_power_cycle_delay;          /* T4 time sequence */
+	u16 gpu_panel_power_up_delay;            /* T1+T2 time sequence */
+	u16 gpu_panel_power_down_delay;          /* T3 time sequence */
+	u16 gpu_panel_power_backlight_on_delay;  /* T5 time sequence */
+	u16 gpu_panel_power_backlight_off_delay; /* Tx time sequence */
+
+	u32 gpu_cpu_backlight;	/* CPU Backlight PWM value */
+	u32 gpu_pch_backlight;	/* PCH Backlight PWM value */
+
+	struct i915_gpu_controller_info gfx;
+
+	/*
+	 * Maximum PCI mmio size in MiB.
+	 */
+	u16 pci_mmio_size;
+};
+
+#endif /* NORTHBRIDGE_INTEL_IRONLAKE_CHIP_H */