porting uboot on a new board(5) board dependent code

- MACH-TYPE
   board/samsung/mango100/mango100.c
   int board_init(void)
   {
gd->bd->bi_arch_number = MACH_TYPE_SMDKC100;
gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;