[MIPS] Routerboard 532: Support for base system

arch/mips/Kconfig

arch/mips/Makefile

arch/mips/configs/rb532_defconfig

arch/mips/pci/Makefile

arch/mips/pci/fixup-rc32434.c

arch/mips/pci/ops-rc32434.c

arch/mips/pci/pci-rc32434.c

arch/mips/rb532/Makefile

arch/mips/rb532/devices.c

arch/mips/rb532/gpio.c

arch/mips/rb532/irq.c

arch/mips/rb532/prom.c

arch/mips/rb532/serial.c

arch/mips/rb532/setup.c

arch/mips/rb532/time.c

include/asm-mips/bootinfo.h

include/asm-mips/mach-rc32434/cpu-feature-overrides.h

include/asm-mips/mach-rc32434/ddr.h

include/asm-mips/mach-rc32434/dma.h

include/asm-mips/mach-rc32434/dma_v.h