iio: buffer-dmaengine: remove non managed alloc/free

 * Once done using the buffer iio_dmaengine_buffer_free() should be used to

 * release it.

 */

struct iio_buffer *iio_dmaengine_buffer_alloc(struct device *dev,

static struct iio_buffer *iio_dmaengine_buffer_alloc(struct device *dev,

	const char *channel)

{

	struct dmaengine_buffer *dmaengine_buffer;

	kfree(dmaengine_buffer);

	return ERR_PTR(ret);

}

EXPORT_SYMBOL(iio_dmaengine_buffer_alloc);

/**

 * iio_dmaengine_buffer_free() - Free dmaengine buffer

 *

 * Frees a buffer previously allocated with iio_dmaengine_buffer_alloc().

 */

void iio_dmaengine_buffer_free(struct iio_buffer *buffer)

static void iio_dmaengine_buffer_free(struct iio_buffer *buffer)

{

	struct dmaengine_buffer *dmaengine_buffer =

		iio_buffer_to_dmaengine_buffer(buffer);

	iio_buffer_put(buffer);

}

EXPORT_SYMBOL_GPL(iio_dmaengine_buffer_free);

static void __devm_iio_dmaengine_buffer_free(struct device *dev, void *res)

{

struct iio_buffer;

struct device;

struct iio_buffer *iio_dmaengine_buffer_alloc(struct device *dev,

	const char *channel);

void iio_dmaengine_buffer_free(struct iio_buffer *buffer);

struct iio_buffer *devm_iio_dmaengine_buffer_alloc(struct device *dev,

						   const char *channel);