geminilake: Factor out MAX_CPUS value

Both Gemini Lake boards in the tree use the same value.

Change-Id: Ib6bd05206026736fd7e3d44b49e4d8ba217c2708
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45142
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/mainboard/google/octopus/Kconfig

@@ -97,10 +97,6 @@ config MAINBOARD_FAMILY
 	string
 	default "Google_Octopus"
 
-config MAX_CPUS
-	int
-	default 4
-
 config UART_FOR_CONSOLE
 	int
 	default 2

src/mainboard/intel/glkrvp/Kconfig

@@ -68,10 +68,6 @@ config MAINBOARD_FAMILY
 	string
 	default "Intel_Glkrvp" if BOARD_INTEL_GLKRVP
 
-config MAX_CPUS
-	int
-	default 4
-
 config UART_FOR_CONSOLE
 	int
 	default 2

src/soc/intel/apollolake/Kconfig

@@ -108,6 +108,10 @@ config CPU_SPECIFIC_OPTIONS
 	select INTEL_GMA_SWSMISCI
 	select HAVE_ASAN_IN_ROMSTAGE
 
+config MAX_CPUS
+	int
+	default 4 if SOC_INTEL_GEMINILAKE
+
 config CHROMEOS
 	select CHROMEOS_RAMOOPS_DYNAMIC