media: vidtv: fix some warnings

As reported by sparse:

	drivers/media/test-drivers/vidtv/vidtv_ts.h:47:47: warning: array of flexible structures
	drivers/media/test-drivers/vidtv/vidtv_channel.c:458:54: warning: incorrect type in argument 3 (different base types)
	drivers/media/test-drivers/vidtv/vidtv_channel.c:458:54:    expected unsigned short [usertype] service_id
	drivers/media/test-drivers/vidtv/vidtv_channel.c:458:54:    got restricted __be16 [usertype] service_id
	drivers/media/test-drivers/vidtv/vidtv_s302m.c:471 vidtv_s302m_encoder_init() warn: possible memory leak of 'e'

Address such warnings.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/test-drivers/vidtv/vidtv_psi.h

@@ -743,7 +743,7 @@ struct vidtv_psi_table_eit {
 struct vidtv_psi_table_eit
 *vidtv_psi_eit_table_init(u16 network_id,
 			  u16 transport_stream_id,
-			  u16 service_id);
+			  __be16 service_id);
 
 /**
  * struct vidtv_psi_eit_write_args - Arguments for writing an EIT section

drivers/media/test-drivers/vidtv/vidtv_s302m.c

@@ -467,8 +467,10 @@ struct vidtv_encoder
 	e->is_video_encoder = false;
 
 	ctx = kzalloc(priv_sz, GFP_KERNEL);
-	if (!ctx)
+	if (!ctx) {
+		kfree(e);
 		return NULL;
+	}
 
 	e->ctx = ctx;
 	ctx->last_duration = 0;

drivers/media/test-drivers/vidtv/vidtv_ts.h

@@ -44,7 +44,7 @@ struct vidtv_mpeg_ts {
 		u8 adaptation_field:1;
 		u8 scrambling:2;
 	} __packed;
-	struct vidtv_mpeg_ts_adaption adaption[];
+	struct vidtv_mpeg_ts_adaption *adaption;
 } __packed;
 
 /**