debayering: typedef half as float to run on pc (#24439)
debayering: typedef half as float to run on pc (#24439)

* debayering: typedef half as float to run on pc

* add casts to literals

* define existing half type

* remove test code
commaai/openpilot,commaai/openpilot,commaai/openpilot,commaai/openpilot,commaai/openpilot,commaai/openpilot