media: v4l2-mediabus: Drop legacy V4L2_MBUS_CSI2_*_LANE flags

The V4L2_MBUS_CSI2_*_LANE flags are a legacy API and are unused. Drop
them.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

include/media/v4l2-mediabus.h

@@ -21,8 +21,6 @@
  * clear both the V4L2_MBUS_HSYNC_ACTIVE_HIGH and the
  * V4L2_MBUS_HSYNC_ACTIVE_LOW flag at the same time. Instead either flag
  * V4L2_MBUS_HSYNC_ACTIVE_HIGH or flag V4L2_MBUS_HSYNC_ACTIVE_LOW shall be set.
- * The same is true for the V4L2_MBUS_CSI2_1/2/3/4_LANE flags group: only one
- * of these four bits shall be set.
  *
  * TODO: replace the existing V4L2_MBUS_* flags with structures of fields
  * to avoid conflicting settings.
@@ -69,11 +67,6 @@
 #define V4L2_MBUS_DATA_ENABLE_LOW		BIT(15)
 
 /* Serial flags */
-/* CSI-2 D-PHY number of data lanes. */
-#define V4L2_MBUS_CSI2_1_LANE			BIT(0)
-#define V4L2_MBUS_CSI2_2_LANE			BIT(1)
-#define V4L2_MBUS_CSI2_3_LANE			BIT(2)
-#define V4L2_MBUS_CSI2_4_LANE			BIT(3)
 /* CSI-2 Virtual Channel identifiers. */
 #define V4L2_MBUS_CSI2_CHANNEL_0		BIT(4)
 #define V4L2_MBUS_CSI2_CHANNEL_1		BIT(5)
@@ -83,10 +76,6 @@
 #define V4L2_MBUS_CSI2_CONTINUOUS_CLOCK		BIT(8)
 #define V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK	BIT(9)
 
-#define V4L2_MBUS_CSI2_LANES		(V4L2_MBUS_CSI2_1_LANE | \
-					 V4L2_MBUS_CSI2_2_LANE | \
-					 V4L2_MBUS_CSI2_3_LANE | \
-					 V4L2_MBUS_CSI2_4_LANE)
 #define V4L2_MBUS_CSI2_CHANNELS		(V4L2_MBUS_CSI2_CHANNEL_0 | \
 					 V4L2_MBUS_CSI2_CHANNEL_1 | \
 					 V4L2_MBUS_CSI2_CHANNEL_2 | \