media: cec/core/cec-notifier: use IS_REACHABLE(CONFIG_I2C)

If CONFIG_I2C=m and CONFIG_CEC_CORE=y then of_find_i2c_device_by_node()
is not reachable. So use IS_REACHABLE instead of IS_ENABLED.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Fixes: a62943c145c1 ("media: cec-notifier: also search for HDMI devices on I2C")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/cec/core/cec-notifier.c

@@ -226,7 +226,7 @@ struct device *cec_notifier_parse_hdmi_phandle(struct device *dev)
 	hdmi_pdev = of_find_device_by_node(np);
 	if (hdmi_pdev)
 		hdmi_dev = &hdmi_pdev->dev;
-#if IS_ENABLED(CONFIG_I2C)
+#if IS_REACHABLE(CONFIG_I2C)
 	if (!hdmi_dev) {
 		struct i2c_client *hdmi_client = of_find_i2c_device_by_node(np);