[media] v4l2-ctrls: use ptrs for all but the s32 type

Rather than having two unions for all types just keep 'val' and
'cur.val' and use the p_cur and p_new unions to access all others.

The only reason for keeping 'val' and 'cur.val' is that it is used
all over, so converting this as well would be a huge job.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h
index a38bd55..eb69c52 100644
--- a/include/media/v4l2-ctrls.h
+++ b/include/media/v4l2-ctrls.h
@@ -187,17 +187,9 @@
 	};
 	unsigned long flags;
 	void *priv;
-	union {
+	s32 val;
+	struct {
 		s32 val;
-		s64 val64;
-		char *string;
-		void *p;
-	};
-	union {
-		s32 val;
-		s64 val64;
-		char *string;
-		void *p;
 	} cur;
 
 	union v4l2_ctrl_ptr p_new;