staging: media: davinci_vpfe: Use __func__ instead of function name

Access current function name using __func__.
Use %s and __func__ instead of function name.
Use of predefined identifier __func__ prevents typo error in function
name in print calls.

Issue found with checkpatch.pl
Signed-off-by: Mamta Shukla <mamtashukla555@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/media/davinci_vpfe/dm365_ipipe.c

@@ -695,21 +695,21 @@ static int ipipe_get_gamma_params(struct vpfe_ipipe_device *ipipe, void *param)
 
 	if (!gamma->bypass_r) {
 		dev_err(dev,
-			"ipipe_get_gamma_params: table ptr empty for R\n");
+			"%s: table ptr empty for R\n", __func__);
 		return -EINVAL;
 	}
 	memcpy(gamma_param->table_r, gamma->table_r,
 	       (table_size * sizeof(struct vpfe_ipipe_gamma_entry)));
 
 	if (!gamma->bypass_g) {
-		dev_err(dev, "ipipe_get_gamma_params: table ptr empty for G\n");
+		dev_err(dev, "%s: table ptr empty for G\n", __func__);
 		return -EINVAL;
 	}
 	memcpy(gamma_param->table_g, gamma->table_g,
 	       (table_size * sizeof(struct vpfe_ipipe_gamma_entry)));
 
 	if (!gamma->bypass_b) {
-		dev_err(dev, "ipipe_get_gamma_params: table ptr empty for B\n");
+		dev_err(dev, "%s: table ptr empty for B\n", __func__);
 		return -EINVAL;
 	}
 	memcpy(gamma_param->table_b, gamma->table_b,