bluetooth powerup

[Sean McNeil]

The software stack I am working with assumes:

1) That the powerup of bluetooth is "1" and powerdown is "0".
2) That reading back the value corresponds to the value, not opposite.
3) No reset required.

The following patch does this. Plus I was wondering if there is
something else on LDO4. Can that regulator be reduced when not powering
bt? Is there any power savings doing so? I've knocked it down to 0 when
turning off and haven't seen any problems so far.

Sean

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