hw/misc/unimp: Display the value with width of the access size

To quickly notice the access size, display the value with the
width of the access (i.e. 16-bit access is displayed 0x0000,
while 8-bit access 0x00).

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20200812190206.31595-3-f4bug@amsat.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

hw/misc/unimp.c

@@ -35,8 +35,8 @@ static void unimp_write(void *opaque, hwaddr offset,
 
     qemu_log_mask(LOG_UNIMP, "%s: unimplemented device write "
                   "(size %d, offset 0x%" HWADDR_PRIx
-                  ", value 0x%" PRIx64 ")\n",
-                  s->name, size, offset, value);
+                  ", value 0x%0*" PRIx64 ")\n",
+                  s->name, size, offset, size << 1, value);
 }
 
 static const MemoryRegionOps unimp_ops = {