dmaengine: imx-dma: Remove i.MX21 support

i.MX21 support has been removed since commit 4b563a0 ("ARM: imx:
Remove imx21 support").

Remove the i.MX21 support inside the imx-dma driver.

Signed-off-by: Fabio Estevam <[email protected]>
Reviewed-by: Peng Fan <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>

Author: Fabio Estevam

drivers/dma/imx-dma.c

@@ -167,7 +167,6 @@ struct imxdma_channel {
 
 enum imx_dma_type {
 	IMX1_DMA,
-	IMX21_DMA,
 	IMX27_DMA,
 };
 
@@ -194,8 +193,6 @@ struct imxdma_filter_data {
 static const struct of_device_id imx_dma_of_dev_id[] = {
 	{
 		.compatible = "fsl,imx1-dma", .data = (const void *)IMX1_DMA,
-	}, {
-		.compatible = "fsl,imx21-dma", .data = (const void *)IMX21_DMA,
 	}, {
 		.compatible = "fsl,imx27-dma", .data = (const void *)IMX27_DMA,
 	}, {