px4fmu-v4:Configure timer IO pins with pull downs
px4fmu-v4:Configure timer IO pins with pull downs

  When the CCER is cleared the IO pin tends to float. The FMUV4
  HW has no TXS0108 and if cut off while high will decay.

  By adding the pull down the pins will seek the low state faster.
  13.8 us from off to decabe below threshold.

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