Add static to local machine declaration.

Variable akitapda_machine is only used locally,
so the static attribute avoids a compiler warning.
Signed-off-by: NStefan Weil <weil@mail.berlios.de>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

hw/spitz.c

@@ -1037,7 +1037,7 @@ static void terrier_init(ram_addr_t ram_size,
                 kernel_cmdline, initrd_filename, cpu_model, terrier, 0x33f);
 }
 
-QEMUMachine akitapda_machine = {
+static QEMUMachine akitapda_machine = {
     .name = "akita",
     .desc = "Akita PDA (PXA270)",
     .init = akita_init,