media: atomisp: use different dfs failed messages

There are several parts of the driver that could produce
a "dfs failed!" message. Change the texts, in order to help
identifying from where they're coming.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/atomisp/pci/atomisp_cmd.c

@@ -1407,10 +1407,10 @@ static void __atomisp_css_recover(struct atomisp_device *isp, bool isp_timeout)
 				       atomisp_css_valid_sof(isp));
 
 		if (atomisp_freq_scaling(isp, ATOMISP_DFS_MODE_AUTO, true) < 0)
-			dev_dbg(isp->dev, "dfs failed!\n");
+			dev_dbg(isp->dev, "DFS auto failed while recovering!\n");
 	} else {
 		if (atomisp_freq_scaling(isp, ATOMISP_DFS_MODE_MAX, true) < 0)
-			dev_dbg(isp->dev, "dfs failed!\n");
+			dev_dbg(isp->dev, "DFS max failed while recovering!\n");
 	}
 
 	for (i = 0; i < isp->num_of_streams; i++) {

drivers/staging/media/atomisp/pci/atomisp_ioctl.c

@@ -1810,15 +1810,15 @@ static int atomisp_streamon(struct file *file, void *fh,
 		if (atomisp_streaming_count(isp) > 1) {
 			if (atomisp_freq_scaling(isp,
 						 ATOMISP_DFS_MODE_MAX, false) < 0)
-				dev_dbg(isp->dev, "dfs failed!\n");
+				dev_dbg(isp->dev, "DFS max mode failed!\n");
 		} else {
 			if (atomisp_freq_scaling(isp,
 						 ATOMISP_DFS_MODE_AUTO, false) < 0)
-				dev_dbg(isp->dev, "dfs failed!\n");
+				dev_dbg(isp->dev, "DFS auto mode failed!\n");
 		}
 	} else {
 		if (atomisp_freq_scaling(isp, ATOMISP_DFS_MODE_MAX, false) < 0)
-			dev_dbg(isp->dev, "dfs failed!\n");
+			dev_dbg(isp->dev, "DFS max mode failed!\n");
 	}
 
 	if (asd->depth_mode->val && atomisp_streaming_count(isp) ==