staging/android: remove struct sync_pt

struct sync_pt was just wrapping around struct fence and creating an
extra abstraction layer. The only two members of struct sync_pt, child_list
and active_list, were moved to struct fence in an earlier commit. After
removing those two members struct sync_pt is nothing more than struct
fence, so remove it all and use struct fence directly.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

include/linux/fence.h

@@ -79,6 +79,8 @@ struct fence {
 	unsigned long flags;
 	ktime_t timestamp;
 	int status;
+	struct list_head child_list;
+	struct list_head active_list;
 };
 
 enum fence_flag_bits {