i386: remove bios_name

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20201026143028.3034018-6-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/hw/i386/microvm.c b/hw/i386/microvm.c
index 5688608..f111ef8 100644
--- a/hw/i386/microvm.c
+++ b/hw/i386/microvm.c
@@ -158,6 +158,7 @@
 
 static void microvm_devices_init(MicrovmMachineState *mms)
 {
+    const char *default_firmware;
     X86MachineState *x86ms = X86_MACHINE(mms);
     ISABus *isa_bus;
     ISADevice *rtc_state;
@@ -274,12 +275,10 @@
         serial_hds_isa_init(isa_bus, 0, 1);
     }
 
-    if (bios_name == NULL) {
-        bios_name = x86_machine_is_acpi_enabled(x86ms)
+    default_firmware = x86_machine_is_acpi_enabled(x86ms)
             ? MICROVM_BIOS_FILENAME
             : MICROVM_QBOOT_FILENAME;
-    }
-    x86_bios_rom_init(get_system_memory(), true);
+    x86_bios_rom_init(MACHINE(mms), default_firmware, get_system_memory(), true);
 }
 
 static void microvm_memory_init(MicrovmMachineState *mms)