[media] uapi/media.h: Use u32 for the number of graph objects

While we need to keep a u64 alignment to avoid compat32 issues,
having the number of entities/pads/links/interfaces represented
by an u64 is incoherent with the ID number, with is an u32.

In order to make it coherent, change those quantities to u32.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

include/uapi/linux/media.h

@@ -330,16 +330,20 @@ struct media_v2_link {
 struct media_v2_topology {
 	__u64 topology_version;
 
-	__u64 num_entities;
+	__u32 num_entities;
+	__u32 reserved1;
 	__u64 ptr_entities;
 
-	__u64 num_interfaces;
+	__u32 num_interfaces;
+	__u32 reserved2;
 	__u64 ptr_interfaces;
 
-	__u64 num_pads;
+	__u32 num_pads;
+	__u32 reserved3;
 	__u64 ptr_pads;
 
-	__u64 num_links;
+	__u32 num_links;
+	__u32 reserved4;
 	__u64 ptr_links;
 };