x86: Rename i386 to x86

MAKEALL

Makefile

README

arch/x86/config.mk

arch/x86/cpu/Makefile

arch/x86/cpu/config.mk

arch/x86/cpu/cpu.c

arch/x86/cpu/interrupts.c

arch/x86/cpu/resetvec.S

arch/x86/cpu/sc520/Makefile

arch/x86/cpu/sc520/sc520.c

arch/x86/cpu/sc520/sc520_car.S

arch/x86/cpu/sc520/sc520_pci.c

arch/x86/cpu/sc520/sc520_sdram.c

arch/x86/cpu/sc520/sc520_ssi.c

arch/x86/cpu/sc520/sc520_timer.c

arch/x86/cpu/start.S

arch/x86/cpu/start16.S

arch/x86/cpu/u-boot.lds

arch/x86/include/asm/bitops.h