ia64: Don't mix code and declarations (not C90-compliant).

arch/ia64/kernel/setup.c

@@ -327,9 +327,11 @@ setup_arch (char **cmdline_p)
 	 * because we don't *really* know whether there's anything there, but we hope that
 	 * all new boxes will implement HCDP.
 	 */
+	{
 		extern unsigned char acpi_legacy_devices;
 		if (!efi.hcdp && acpi_legacy_devices)
 			setup_serial_legacy();
+	}
 #endif
 
 #ifdef CONFIG_VT