dmaengine: xilinx: use strscpy to replace strlcpy

The strlcpy should not be used because it doesn't limit the source
length. Preferred is strscpy.

Signed-off-by: XueBing Chen <chenxuebing@jari.cn>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://lore.kernel.org/r/39aa840f.e31.181ed9461c2.Coremail.chenxuebing@jari.cn
Signed-off-by: Vinod Koul <vkoul@kernel.org>

Author: XueBing Chen

drivers/dma/xilinx/xilinx_dpdma.c

@@ -376,7 +376,7 @@ static ssize_t xilinx_dpdma_debugfs_read(struct file *f, char __user *buf,
 		if (ret < 0)
 			goto done;
 	} else {
-		strlcpy(kern_buff, "No testcase executed",
+		strscpy(kern_buff, "No testcase executed",
 			XILINX_DPDMA_DEBUGFS_READ_MAX_SIZE);
 	}