add ptp_olympus_omd_move_focus (generic wrapper with 2 arguments)
add ptp_olympus_omd_move_focus (generic wrapper with 2 arguments)

gphoto/libgphoto2,gphoto/libgphoto2,gphoto/libgphoto2,gphoto/libgphoto2,gphoto/libgphoto2,gphoto/libgphoto2