Overview
  --------
  P1022ds is a Low End Dual core platform supporting the P1022 processor
  of QorIQ series. P1022 is an e500 based dual core SOC.
  
  
  Pin Multiplex(hwconfig setting)
  -------------------------------
  Add the environment 'usb2', 'audclk' and 'tdm' to support pin multiplex
  via hwconfig, i.e:
  'setenv hwconfig usb2' to enable USB2 and disable eTsec2
  'setenv hwconfig tdm' to enable TDM and disable Audio
  'setenv hwconfig audclk:12' to enable Audio(codec clock sources is 12MHz)
   and disable TDM
  'setenv hwconfig 'usb2;tdm' to enable USB2 and TDM, disable eTsec2 and Audio
  'setenv hwconfig 'usb2;audclk:11' to enable USB2 and Audio(codec clock sources
   is 11MHz), disable eTsec2 and TDM
  
  Warning: TDM and AUDIO can not enable simultaneous !
  and AUDIO codec clock sources only setting as 11MHz or 12MHz !
  'setenv hwconfig 'audclk:12;tdm'	--- error !
  'setenv hwconfig 'audclk:11;tdm'	--- error !
  'setenv hwconfig 'audclk:10'		--- error !