media: v4l2-ctrls: Add user control base for Nuvoton NPCM controls

Add a control base for Nuvoton NPCM driver controls, and reserve 16
controls.
Signed-off-by: Marvin Lin <milkfafa@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

include/uapi/linux/v4l2-controls.h

@@ -203,6 +203,12 @@ enum v4l2_colorfx {
  */
 #define V4L2_CID_USER_ASPEED_BASE		(V4L2_CID_USER_BASE + 0x11a0)
 
+/*
+ * The base for Nuvoton NPCM driver controls.
+ * We reserve 16 controls for this driver.
+ */
+#define V4L2_CID_USER_NPCM_BASE			(V4L2_CID_USER_BASE + 0x11b0)
+
 /* MPEG-class control IDs */
 /* The MPEG controls are applicable to all codec controls
  * and the 'MPEG' part of the define is historical */