soc/intel/skylake: Move MAX_CPUS from mb to SoC

Configure MAX_CPUS in SoC Kconfig with 8 as default value and remove it
from every mainboard where 8 is used.

Change-Id: I825625bf842e8cd22dada9a508a7176e5cc2ea57
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49105
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/51nb/x210/Kconfig

@@ -28,10 +28,6 @@ config MAINBOARD_DIR
 	string
 	default "51nb/x210"
 
-config MAX_CPUS
-	int
-	default 8
-
 config VGA_BIOS_ID
 	string
 	default "8086,5917"

src/mainboard/asrock/h110m/Kconfig

@@ -29,10 +29,6 @@ config MAINBOARD_PART_NUMBER
 	string
 	default "H110M"
 
-config MAX_CPUS
-	int
-	default 8
-
 config DEVICETREE
 	string
 	default "devicetree.cb"

src/mainboard/clevo/kbl-u/Kconfig

@@ -59,10 +59,6 @@ config FMDFILE
 #	default "src/mainboard/$(CONFIG_MAINBOARD_DIR)/fmds/vboot-roa.fmd"	if VBOOT_SLOTS_RW_A && !VBOOT_SLOTS_RW_AB
 #	default "src/mainboard/$(CONFIG_MAINBOARD_DIR)/fmds/vboot-roab.fmd"	if VBOOT_SLOTS_RW_AB
 
-config MAX_CPUS
-	int
-	default 8
-
 config DIMM_MAX
 	int
 	default 2

src/mainboard/google/eve/Kconfig

@@ -62,10 +62,6 @@ config MAINBOARD_FAMILY
 	string
 	default "Google_Eve"
 
-config MAX_CPUS
-	int
-	default 8
-
 config INCLUDE_NHLT_BLOBS
 	bool "Include blobs for audio."
 	select NHLT_RT5514

src/mainboard/google/fizz/Kconfig

@@ -60,10 +60,6 @@ config MAINBOARD_FAMILY
 	default "Google_Kalista" if BOARD_GOOGLE_KARMA
 	default "Google_Endeavour" if BOARD_GOOGLE_ENDEAVOUR
 
-config MAX_CPUS
-	int
-	default 8
-
 config DIMM_MAX
 	int
 	default 2

src/mainboard/google/glados/Kconfig

@@ -65,10 +65,6 @@ config OVERRIDE_DEVICETREE
 	string
 	default "variants/\$(CONFIG_VARIANT_DIR)/overridetree.cb"
 
-config MAX_CPUS
-	int
-	default 8
-
 config TPM_PIRQ
 	hex
 	default 0x18  # GPP_E0_IRQ

src/mainboard/google/poppy/Kconfig

@@ -108,10 +108,6 @@ config MAINBOARD_PART_NUMBER
 	default "Rammus" if BOARD_GOOGLE_RAMMUS
 	default "Soraka" if BOARD_GOOGLE_SORAKA
 
-config MAX_CPUS
-	int
-	default 8
-
 config OEM_BIN_FILE
 	string "OEM ID table"
 	default ""

src/mainboard/intel/kblrvp/Kconfig

@@ -43,10 +43,6 @@ config MAINBOARD_FAMILY
 	string
 	default "Intel_Kblrvp"
 
-config MAX_CPUS
-	int
-	default 8
-
 config TPM_PIRQ
 	hex
 	default 0x18  # GPP_E0_IRQ

src/mainboard/intel/kunimitsu/Kconfig

@@ -41,10 +41,6 @@ config MAINBOARD_FAMILY
 	string
 	default "Intel_Kunimitsu"
 
-config MAX_CPUS
-	int
-	default 8
-
 config TPM_PIRQ
 	hex
 	default 0x18  # GPP_E0_IRQ

src/mainboard/intel/saddlebrook/Kconfig

@@ -32,10 +32,6 @@ config MAINBOARD_FAMILY
 	string
 	default "Intel_SaddleBrook"
 
-config MAX_CPUS
-	int
-	default 8
-
 config TPM_PIRQ
 	hex
 	default 0x18  # GPP_E0_IRQ

src/mainboard/kontron/bsl6/Kconfig

@@ -54,10 +54,6 @@ config CBFS_SIZE
 	hex
 	default 0x600000 if BOARD_SIEMENS_BOXER26
 
-config MAX_CPUS
-	int
-	default 8
-
 config DIMM_MAX
 	int
 	default 2

src/mainboard/purism/librem_skl/Kconfig

@@ -47,10 +47,6 @@ config OVERRIDE_DEVICETREE
 	string
 	default "variants/\$(CONFIG_VARIANT_DIR)/overridetree.cb"
 
-config MAX_CPUS
-	int
-	default 8
-
 config VGA_BIOS_ID
 	string
 	default "8086,1916" if BOARD_PURISM_LIBREM13_V2 || BOARD_PURISM_LIBREM15_V3

src/mainboard/supermicro/x11-lga1151-series/Kconfig

@@ -75,10 +75,6 @@ config IRQ_SLOT_COUNT
 	int
 	default 18
 
-config MAX_CPUS
-	int
-	default 8
-
 config CONSOLE_POST
 	bool
 	default y

src/soc/intel/skylake/Kconfig

@@ -80,6 +80,10 @@ config CPU_SPECIFIC_OPTIONS
 	select UDELAY_TSC
 	select UDK_2015_BINDING
 
+config MAX_CPUS
+	int
+	default 8
+
 config FSP_HYPERTHREADING
 	bool "Enable Hyper-Threading"
 	default y