iio: imu: mpu6050: Fix alignment for DMA safety

____cacheline_aligned is an insufficient guarantee for non-coherent DMA
on platforms with 128 byte cachelines above L1.  Switch to the updated
IIO_DMA_MINALIGN definition.

Fixes: 6b0cc5dc ("iio:imu:inv_mpu6050 Fix dma and ts alignment and data leak issues.")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@tdk.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-80-jic23@kernel.org

drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h

@@ -204,7 +204,7 @@ struct inv_mpu6050_state {
 	s32 magn_raw_to_gauss[3];
 	struct iio_mount_matrix magn_orient;
 	unsigned int suspended_sensors;
-	u8 data[INV_MPU6050_OUTPUT_DATA_SIZE] ____cacheline_aligned;
+	u8 data[INV_MPU6050_OUTPUT_DATA_SIZE] __aligned(IIO_DMA_MINALIGN);
 };
 
 /*register and associated bit definition*/