iio: imu: inv_mpu6050: fix frequency setting when chip is off

commit daec424c upstream.

Track correctly FIFO state and apply ODR change before starting
the chip. Without the fix, you cannot change ODR more than 1 time
when data buffering is off. This restriction on a single pending ODR
change should only apply when the FIFO is on.

Fixes: 111e1abd ("iio: imu: inv_mpu6050: use the common inv_sensors timestamp module")
Cc: stable@vger.kernel.org
Signed-off-by: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@tdk.com>
Link: https://lore.kernel.org/r/20240219154741.90601-1-inv.git-commit@tdk.com


Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>