1st set of IIO fixes for 6.0-rc1

adi,ad7292
 - Prevent duplicate disable of regulator in error path.

bosch,bmg160
 - Correct dt-binding to allow for 2 interrupt pins.

capella,cm3605
 - Fix missing error cleanup due to premature return.

capella,cm32181
 - Fix missing static on local symbol.

microchip,mcp33911
 - Correctly handle sign bit.
 - Fix mismatch between driver and DT binding, including fallback to old
   driver behavior.
 - Use correct formula for voltage calculation.
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