[media] drx-j: Use kmemdup instead of kmalloc + memcpy

This issue was reported by coccicheck using the semantic patch
at scripts/coccinelle/api/memdup.cocci
Signed-off-by: Benoit Taine <benoit.taine@lip6.fr>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/dvb-frontends/drx39xyj/drxj.c

@@ -12272,22 +12272,20 @@ struct dvb_frontend *drx39xxj_attach(struct i2c_adapter *i2c)
 	if (demod == NULL)
 		goto error;
 
-	demod_addr = kmalloc(sizeof(struct i2c_device_addr), GFP_KERNEL);
+	demod_addr = kmemdup(&drxj_default_addr_g,
+			     sizeof(struct i2c_device_addr), GFP_KERNEL);
 	if (demod_addr == NULL)
 		goto error;
-	memcpy(demod_addr, &drxj_default_addr_g,
-	       sizeof(struct i2c_device_addr));
 
-	demod_comm_attr = kmalloc(sizeof(struct drx_common_attr), GFP_KERNEL);
+	demod_comm_attr = kmemdup(&drxj_default_comm_attr_g,
+				  sizeof(struct drx_common_attr), GFP_KERNEL);
 	if (demod_comm_attr == NULL)
 		goto error;
-	memcpy(demod_comm_attr, &drxj_default_comm_attr_g,
-	       sizeof(struct drx_common_attr));
 
-	demod_ext_attr = kmalloc(sizeof(struct drxj_data), GFP_KERNEL);
+	demod_ext_attr = kmemdup(&drxj_data_g, sizeof(struct drxj_data),
+				 GFP_KERNEL);
 	if (demod_ext_attr == NULL)
 		goto error;
-	memcpy(demod_ext_attr, &drxj_data_g, sizeof(struct drxj_data));
 
 	/* setup the state */
 	state->i2c = i2c;