Don't load options roms intended to be loaded by the bios in qemu

The first such option rom will load at address 0, which isn't very nice,
and the second will report a conflict and abort, which is horrible.

Signed-off-by: Avi Kivity <avi@redhat.com>

hw/loader.c

@@ -636,6 +636,9 @@ static void rom_reset(void *unused)
     Rom *rom;
 
     QTAILQ_FOREACH(rom, &roms, next) {
+        if (rom->fw_file) {
+            continue;
+        }
         if (rom->data == NULL)
             continue;
         cpu_physical_memory_write_rom(rom->addr, rom->data, rom->romsize);
@@ -654,6 +657,9 @@ int rom_load_all(void)
     Rom *rom;
 
     QTAILQ_FOREACH(rom, &roms, next) {
+        if (rom->fw_file) {
+            continue;
+        }
         if (addr > rom->addr) {
             fprintf(stderr, "rom: requested regions overlap "
                     "(rom %s. free=0x" TARGET_FMT_plx
@@ -752,7 +758,7 @@ void do_info_roms(Monitor *mon)
     Rom *rom;
 
     QTAILQ_FOREACH(rom, &roms, next) {
-        if (rom->addr) {
+        if (!rom->fw_file) {
             monitor_printf(mon, "addr=" TARGET_FMT_plx
                            " size=0x%06zx mem=%s name=\"%s\" \n",
                            rom->addr, rom->romsize,