staging: media: davinci_vpfe: remove ret variable in switch statements

Remove ret variable in functions that used it to determine the return.
Simplified the return logic for these functions.

Found with Coccinelle script:

@@
local idexpression ret;
expression c,d;
identifier label;
@@

switch ( ... ) {
case label :
...
- ret = c;
- break;
+ return c;
...
default:
...
- ret = d;
+ return d;
...
}
... when != ret
- return ret;

@@
type T; identifier i;
@@
- T i;
... when != i

Signed-off-by: Thaissa Falbo <thaissa.falbo@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/media/davinci_vpfe/dm365_ipipe.c

@@ -1350,21 +1350,16 @@ error:
  */
 static long ipipe_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
 {
-	int ret = 0;
-
 	switch (cmd) {
 	case VIDIOC_VPFE_IPIPE_S_CONFIG:
-		ret = ipipe_s_config(sd, arg);
-		break;
+		return ipipe_s_config(sd, arg);
 
 	case VIDIOC_VPFE_IPIPE_G_CONFIG:
-		ret = ipipe_g_config(sd, arg);
-		break;
+		return ipipe_g_config(sd, arg);
 
 	default:
-		ret = -ENOIOCTLCMD;
+		return -ENOIOCTLCMD;
 	}
-	return ret;
 }
 
 void vpfe_ipipe_enable(struct vpfe_device *vpfe_dev, int en)

drivers/staging/media/davinci_vpfe/dm365_isif.c

@@ -626,21 +626,16 @@ static int isif_set_params(struct v4l2_subdev *sd, void *params)
  */
 static long isif_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
 {
-	int ret;
-
 	switch (cmd) {
 	case VIDIOC_VPFE_ISIF_S_RAW_PARAMS:
-		ret = isif_set_params(sd, arg);
-		break;
+		return isif_set_params(sd, arg);
 
 	case VIDIOC_VPFE_ISIF_G_RAW_PARAMS:
-		ret = isif_get_params(sd, arg);
-		break;
+		return isif_get_params(sd, arg);
 
 	default:
-		ret = -ENOIOCTLCMD;
+		return -ENOIOCTLCMD;
 	}
-	return ret;
 }
 
 static void isif_config_gain_offset(struct vpfe_isif_device *isif)