FDT_REG_CELLS
pcell_t reserve[FDT_REG_CELLS * FDT_MEM_REGIONS];
pcell_t reg[FDT_REG_CELLS];
if (addr_cells + size_cells > FDT_REG_CELLS)
pcell_t reg[FDT_REG_CELLS * FDT_MEM_REGIONS];
pcell_t reg[FDT_REG_CELLS * FDT_MEM_REGIONS];