fakebop: use a memlist to keep track of physical memory

*** 86,97 ****
   * headers. This is simple and naive and will need to evolve as we have
   * additional boards beyond just the RPi.
   */
  typedef struct bootinfo {
          uint_t          bi_flags;
-         uint32_t        bi_memsize;
-         uint32_t        bi_memstart;
          char            *bi_cmdline;
          uint32_t        bi_ramdisk;
          uint32_t        bi_ramsize;
  } bootinfo_t;
  
--- 86,95 ----
*** 373,384 ****
                                      amp->am_start, amp->am_start +
                                      amp->am_size - 1);
                                  break;
                          }
  
!                         bp->bi_memsize = amp->am_size;
!                         bp->bi_memstart = amp->am_start;
                          got_mem = B_TRUE;
                          break;
                  case ATAG_CMDLINE:
                          alp = (atag_cmdline_t *)ahp;
                          bp->bi_cmdline = alp->al_cmdline;
--- 371,384 ----
                                      amp->am_start, amp->am_start +
                                      amp->am_size - 1);
                                  break;
                          }
  
!                         bootop.boot_mem.physinstalled.ml_address = amp->am_start;
!                         bootop.boot_mem.physinstalled.ml_size = amp->am_size;
!                         bootop.boot_mem.physinstalled.ml_prev = NULL;
!                         bootop.boot_mem.physinstalled.ml_next = NULL;
                          got_mem = B_TRUE;
                          break;
                  case ATAG_CMDLINE:
                          alp = (atag_cmdline_t *)ahp;
                          bp->bi_cmdline = alp->al_cmdline;