drivers: media: imx296: Add the link frequency control

Add the V4L2_CID_LINK_FREQ menu control for the imx296. Report a single value
of 1188 Mhz for the link frequency.

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>

drivers/media/i2c/imx296.c

@@ -306,6 +306,10 @@ static const char * const imx296_test_pattern_menu[] = {
 	"Checks",
 };
 
+static const s64 imx296_link_freq_menu[] = {
+	1188000000ULL,
+};
+
 static void imx296_adjust_exposure_range(struct imx296 *sensor,
 					 struct v4l2_ctrl *ctrl)
 {
@@ -461,6 +465,10 @@ static int imx296_ctrls_init(struct imx296 *sensor)
 				     ARRAY_SIZE(imx296_test_pattern_menu) - 1,
 				     0, 0, imx296_test_pattern_menu);
 
+	v4l2_ctrl_new_int_menu(&sensor->ctrls, NULL, V4L2_CID_LINK_FREQ,
+			       ARRAY_SIZE(imx296_link_freq_menu) - 1, 0,
+			       imx296_link_freq_menu);
+
 	v4l2_ctrl_new_fwnode_properties(&sensor->ctrls, &imx296_ctrl_ops,
 					&props);