dmaengine: at_hdmac: Check return code of dma_async_device_register

dmaengine: at_hdmac: Check return code of dma_async_device_register

commit 02888b04b76037829aa9906a01ec7e00973c7afb upstream.

dma_async_device_register() can fail, check the return code and display an
error.

Fixes: a8ae07d54e40 ("dmaengine: at_hdmac: new driver for the Atmel AHB DMA Controller")
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Cc: stable@vger.kernel.org
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20221025090306.297886-1-tudor.ambarus@microchip.com
Link: https://lore.kernel.org/r/20221025090306.297886-16-tudor.ambarus@microchip.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>