MIPS: Remove useless zero initializations.

arch/mips/boot/elf2ecoff.c

arch/mips/dec/prom/memory.c

arch/mips/emma/markeins/setup.c

arch/mips/fw/cfe/cfe_api.c

arch/mips/kernel/cpu-bugs64.c

arch/mips/kernel/cpu-probe.c

arch/mips/kernel/kspd.c

arch/mips/kernel/mips-mt-fpaff.c

arch/mips/kernel/mips-mt.c

arch/mips/kernel/rtlx.c

arch/mips/kernel/setup.c

arch/mips/kernel/smtc.c

arch/mips/kernel/vpe.c

arch/mips/mipssim/sim_setup.c

arch/mips/mm/tlb-r4k.c

arch/mips/mti-malta/malta-init.c

arch/mips/nxp/pnx833x/stb22x/board.c

arch/mips/nxp/pnx8550/common/proc.c

arch/mips/pci/pci-bcm1480.c

arch/mips/pci/pci-bcm1480ht.c