[MIPS] Kconfig: Provide sane NR_CPUS defaults for more configurations

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/Kconfig

@@ -575,6 +575,7 @@ config SGI_IP27
 	select DMA_IP27
 	select EARLY_PRINTK
 	select HW_HAS_PCI
+	select NR_CPUS_DEFAULT_64
 	select PCI_DOMAINS
 	select SYS_HAS_CPU_R10000
 	select SYS_SUPPORTS_64BIT_KERNEL
@@ -612,6 +613,7 @@ config SIBYTE_BIGSUR
 	bool "Sibyte BCM91480B-BigSur"
 	select BOOT_ELF32
 	select DMA_COHERENT
+	select NR_CPUS_DEFAULT_4
 	select PCI_DOMAINS
 	select SIBYTE_BCM1x80
 	select SWAP_IO_SPACE
@@ -623,6 +625,7 @@ config SIBYTE_SWARM
 	bool "Sibyte BCM91250A-SWARM"
 	select BOOT_ELF32
 	select DMA_COHERENT
+	select NR_CPUS_DEFAULT_2
 	select SIBYTE_SB1250
 	select SWAP_IO_SPACE
 	select SYS_HAS_CPU_SB1
@@ -635,6 +638,7 @@ config SIBYTE_SENTOSA
 	depends on EXPERIMENTAL
 	select BOOT_ELF32
 	select DMA_COHERENT
+	select NR_CPUS_DEFAULT_2
 	select SIBYTE_SB1250
 	select SWAP_IO_SPACE
 	select SYS_HAS_CPU_SB1
@@ -668,6 +672,7 @@ config SIBYTE_PTSWARM
 	depends on EXPERIMENTAL
 	select BOOT_ELF32
 	select DMA_COHERENT
+	select NR_CPUS_DEFAULT_2
 	select SIBYTE_SB1250
 	select SWAP_IO_SPACE
 	select SYS_HAS_CPU_SB1
@@ -680,6 +685,7 @@ config SIBYTE_LITTLESUR
 	depends on EXPERIMENTAL
 	select BOOT_ELF32
 	select DMA_COHERENT
+	select NR_CPUS_DEFAULT_2
 	select SIBYTE_SB1250
 	select SWAP_IO_SPACE
 	select SYS_HAS_CPU_SB1
@@ -1524,6 +1530,8 @@ config MIPS_MT_SMTC
 	select CPU_MIPSR2_IRQ_VI
 	select CPU_MIPSR2_SRS
 	select MIPS_MT
+	select NR_CPUS_DEFAULT_2
+	select NR_CPUS_DEFAULT_8
 	select SMP
 	select SYS_SUPPORTS_SMP
 	help
@@ -1739,13 +1747,34 @@ config SMP
 config SYS_SUPPORTS_SMP
 	bool
 
+config NR_CPUS_DEFAULT_2
+	bool
+
+config NR_CPUS_DEFAULT_4
+	bool
+
+config NR_CPUS_DEFAULT_8
+	bool
+
+config NR_CPUS_DEFAULT_16
+	bool
+
+config NR_CPUS_DEFAULT_32
+	bool
+
+config NR_CPUS_DEFAULT_64
+	bool
+
 config NR_CPUS
 	int "Maximum number of CPUs (2-64)"
 	range 2 64
 	depends on SMP
-	default "64" if SGI_IP27
-	default "2"
-	default "8" if MIPS_MT_SMTC
+	default "2" if NR_CPUS_DEFAULT_2
+	default "4" if NR_CPUS_DEFAULT_4
+	default "8" if NR_CPUS_DEFAULT_8
+	default "16" if NR_CPUS_DEFAULT_16
+	default "32" if NR_CPUS_DEFAULT_32
+	default "64" if NR_CPUS_DEFAULT_64
 	help
 	  This allows you to specify the maximum number of CPUs which this
 	  kernel will support.  The maximum supported value is 32 for 32-bit