lm32: remove bios_name

Cc: Michael Walle <michael@walle.cc>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20201026143028.3034018-7-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

hw/lm32/milkymist.c

@@ -108,6 +108,7 @@ static void
 milkymist_init(MachineState *machine)
 {
     MachineClass *mc = MACHINE_GET_CLASS(machine);
+    const char *bios_name = machine->firmware ?: BIOS_FILENAME;
     const char *kernel_filename = machine->kernel_filename;
     const char *kernel_cmdline = machine->kernel_cmdline;
     const char *initrd_filename = machine->initrd_filename;
@@ -162,9 +163,6 @@ milkymist_init(MachineState *machine)
     }
 
     /* load bios rom */
-    if (bios_name == NULL) {
-        bios_name = BIOS_FILENAME;
-    }
     bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 
     if (bios_filename) {