hw/nubus: increase maximum Declaration ROM size from 128k to 1Mb

Whilst 128k is more than enough for a typical Declaration ROM, a C compiler
configured to produce an unstripped debug binary can generate a ROM image that
exceeds this limit. Increase the maximum size to 1Mb to help make life easier
for developers.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-ID: <20240111102954.449462-3-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
diff --git a/include/hw/nubus/nubus.h b/include/hw/nubus/nubus.h
index b3b4d2e..fee79b7 100644
--- a/include/hw/nubus/nubus.h
+++ b/include/hw/nubus/nubus.h
@@ -51,7 +51,7 @@
     qemu_irq irqs[NUBUS_IRQS];
 };
 
-#define NUBUS_DECL_ROM_MAX_SIZE    (128 * KiB)
+#define NUBUS_DECL_ROM_MAX_SIZE    (1 * MiB)
 
 struct NubusDevice {
     DeviceState qdev;