librtas: deprecate rtas_delay_timeout()

Despite its description rtas_delay_timeout() sets an internal timeout
value as opposed to returning the delay time as documented. This timeout
short cuts the logic in handle_delay(). Fortunately this is unsed by
default. The library should run operations to completion, otherwise we
risk leaving things in an unrecoverable state.

Mark rtas_delay_timeout() with __attribute__ ((deprecated)) as
preperation for eventual removal.

Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>

librtas_src/syscall_calls.c

@@ -333,6 +333,7 @@ int rtas_cfg_connector(char *workarea)
  * @param timeout_ms timeout in milli-seconds
  * @return delay time
  */
+__attribute__ ((deprecated))
 int rtas_delay_timeout(uint64_t timeout_ms)
 {
 	int rc;