net:wimax: Fix doucble word "the the" in networking.xml

This patch fix a double word "the the"
in Documentation/DocBook/networking.xml and
Documentation/DocBook/networking/API-Wimax-report-rfkill-sw.html.

These files are generated from comment in source, so I had to
fix the typo in net/wimax/io-rfkill.c
Signed-off-by: NMasanari Iida <standby24x7@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/wimax/op-rfkill.c

@@ -135,8 +135,7 @@ EXPORT_SYMBOL_GPL(wimax_report_rfkill_hw);
  * @state: New state of the RF kill switch. %WIMAX_RF_ON radio on,
  *     %WIMAX_RF_OFF radio off.
  *
- * Reports changes in the software RF switch state to the the WiMAX
- * stack.
+ * Reports changes in the software RF switch state to the WiMAX stack.
  *
  * The main use is during initialization, so the driver can query the
  * device for its current software radio kill switch state and feed it