12208 dboot_printf(): support %u

*** 183,193 ****
                  shdr = (Elf64_Shdr *)(sechdrs + eh->e_shentsize * i);
  
                  /* zero out bss */
                  if (shdr->sh_type == SHT_NOBITS) {
                          if (prom_debug)
!                                 dboot_printf("zeroing BSS %ld bytes from "
                                      "physaddr 0x%" PRIx64
                                      " (end=0x%" PRIx64 ")\n",
                                      (ulong_t)shdr->sh_size,
                                      next_addr,
                                      next_addr + shdr->sh_size);
--- 183,193 ----
                  shdr = (Elf64_Shdr *)(sechdrs + eh->e_shentsize * i);
  
                  /* zero out bss */
                  if (shdr->sh_type == SHT_NOBITS) {
                          if (prom_debug)
!                                 dboot_printf("zeroing BSS %lu bytes from "
                                      "physaddr 0x%" PRIx64
                                      " (end=0x%" PRIx64 ")\n",
                                      (ulong_t)shdr->sh_size,
                                      next_addr,
                                      next_addr + shdr->sh_size);