[media] media: i2c: Convert to devm_kzalloc()

Using the managed function the kfree() calls can be removed from the
probe error path and the remove handler.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/i2c/msp3400-driver.c b/drivers/media/i2c/msp3400-driver.c
index 54a9dd3..ae92c20 100644
--- a/drivers/media/i2c/msp3400-driver.c
+++ b/drivers/media/i2c/msp3400-driver.c
@@ -707,7 +707,7 @@
 		return -ENODEV;
 	}
 
-	state = kzalloc(sizeof(*state), GFP_KERNEL);
+	state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);
 	if (!state)
 		return -ENOMEM;
 
@@ -732,7 +732,6 @@
 	if (state->rev1 == -1 || (state->rev1 == 0 && state->rev2 == 0)) {
 		v4l_dbg(1, msp_debug, client,
 				"not an msp3400 (cannot read chip version)\n");
-		kfree(state);
 		return -ENODEV;
 	}
 
@@ -827,7 +826,6 @@
 		int err = hdl->error;
 
 		v4l2_ctrl_handler_free(hdl);
-		kfree(state);
 		return err;
 	}
 
@@ -889,7 +887,6 @@
 	msp_reset(client);
 
 	v4l2_ctrl_handler_free(&state->hdl);
-	kfree(state);
 	return 0;
 }