i945 boards: Factor out MAX_CPUS

At least one mobile 945 series northbridge supports 4 threads, because
the dual-core Atom 330 CPU supports Hyper-threading. Therefore, we use
that as the default for this chipset.

Change-Id: I899ed1644d9b2da4fc72f09233a421200770110d
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41845
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/asus/p5gc-mx/Kconfig b/src/mainboard/asus/p5gc-mx/Kconfig
index 550722b..ff3bbca 100644
--- a/src/mainboard/asus/p5gc-mx/Kconfig
+++ b/src/mainboard/asus/p5gc-mx/Kconfig
@@ -26,8 +26,4 @@
 	string
 	default "P5GC-MX"
 
-config MAX_CPUS
-	int
-	default 4 ## 2 may be the chipsets limit
-
 endif # BOARD_ASUS_P5GC_MX
diff --git a/src/mainboard/getac/p470/Kconfig b/src/mainboard/getac/p470/Kconfig
index 283ff65..55a3646 100644
--- a/src/mainboard/getac/p470/Kconfig
+++ b/src/mainboard/getac/p470/Kconfig
@@ -34,10 +34,6 @@
 	int
 	default 18
 
-config MAX_CPUS
-	int
-	default 4
-
 config VGA_BIOS_FILE
 	string
 	default "getac-pci8086,27a2.rom"
diff --git a/src/mainboard/ibase/mb899/Kconfig b/src/mainboard/ibase/mb899/Kconfig
index b3ffd2b..94c4e23 100644
--- a/src/mainboard/ibase/mb899/Kconfig
+++ b/src/mainboard/ibase/mb899/Kconfig
@@ -29,10 +29,6 @@
 	int
 	default 18
 
-config MAX_CPUS
-	int
-	default 4
-
 config VGA_BIOS_FILE
 	string
 	default "amipci_01.20"
diff --git a/src/mainboard/intel/d945gclf/Kconfig b/src/mainboard/intel/d945gclf/Kconfig
index c8c7808..06e1a0c 100644
--- a/src/mainboard/intel/d945gclf/Kconfig
+++ b/src/mainboard/intel/d945gclf/Kconfig
@@ -31,8 +31,4 @@
 	int
 	default 18
 
-config MAX_CPUS
-	int
-	default 4
-
 endif # BOARD_INTEL_D945GCLF
diff --git a/src/mainboard/kontron/986lcd-m/Kconfig b/src/mainboard/kontron/986lcd-m/Kconfig
index dfc7c3c..006837a 100644
--- a/src/mainboard/kontron/986lcd-m/Kconfig
+++ b/src/mainboard/kontron/986lcd-m/Kconfig
@@ -31,10 +31,6 @@
 	int
 	default 18
 
-config MAX_CPUS
-	int
-	default 4
-
 config VGA_BIOS_FILE
 	string
 	default "amipci_01.20"
diff --git a/src/mainboard/roda/rk886ex/Kconfig b/src/mainboard/roda/rk886ex/Kconfig
index 9d08c96..112d3ad 100644
--- a/src/mainboard/roda/rk886ex/Kconfig
+++ b/src/mainboard/roda/rk886ex/Kconfig
@@ -32,10 +32,6 @@
 	int
 	default 18
 
-config MAX_CPUS
-	int
-	default 4
-
 config MAXIMUM_SUPPORTED_FREQUENCY
 	int
 	default 400
diff --git a/src/northbridge/intel/i945/Kconfig b/src/northbridge/intel/i945/Kconfig
index 754f36c..d6498f1 100644
--- a/src/northbridge/intel/i945/Kconfig
+++ b/src/northbridge/intel/i945/Kconfig
@@ -73,4 +73,8 @@
 	hex
 	default 0x100000
 
+config MAX_CPUS
+	int
+	default 4
+
 endif