MIPS: generic: Enable all CPUs supported by virt board in Kconfig

Enable extra CPUs that may be supported by virt board, including
R4x00 (R4000 in QEMU), Cavium Octeon (Octeon68XX in QEMU), loongson2e,
loongson2f.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

arch/mips/Kconfig

@@ -153,12 +153,16 @@ config MIPS_GENERIC_KERNEL
 	select PCI_DRIVERS_GENERIC
 	select SMP_UP if SMP
 	select SWAP_IO_SPACE
+	select SYS_HAS_CPU_CAVIUM_OCTEON
+	select SYS_HAS_CPU_LOONGSON2E
+	select SYS_HAS_CPU_LOONGSON2F
 	select SYS_HAS_CPU_MIPS32_R1
 	select SYS_HAS_CPU_MIPS32_R2
 	select SYS_HAS_CPU_MIPS32_R6
 	select SYS_HAS_CPU_MIPS64_R1
 	select SYS_HAS_CPU_MIPS64_R2
 	select SYS_HAS_CPU_MIPS64_R6
+	select SYS_HAS_CPU_R4X00
 	select SYS_SUPPORTS_32BIT_KERNEL
 	select SYS_SUPPORTS_64BIT_KERNEL
 	select SYS_SUPPORTS_BIG_ENDIAN