video: remove valid pointer check in api entry points

Now that video api functions have __ASSERT_NO_MSG calls, drivers
do not need to check the entry point functions pointers.

Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>

Author: Alain Volmat

drivers/video/ov7670.c

@@ -448,9 +448,6 @@ static int ov7670_get_fmt(const struct device *dev, struct video_format *fmt)
 {
 	struct ov7670_data *data = dev->data;
 
-	if (fmt == NULL) {
-		return -EINVAL;
-	}
 	memcpy(fmt, &data->fmt, sizeof(data->fmt));
 	return 0;
 }

drivers/video/video_esp32_dvp.c

@@ -259,10 +259,6 @@ static int video_esp32_get_fmt(const struct device *dev, struct video_format *fm
 
 	LOG_DBG("Get format");
 
-	if (fmt == NULL) {
-		return -EINVAL;
-	}
-
 	ret = video_get_format(cfg->source_dev, fmt);
 	if (ret) {
 		LOG_ERR("Failed to get format from source");
@@ -280,10 +276,6 @@ static int video_esp32_set_fmt(const struct device *dev, struct video_format *fm
 	struct video_esp32_data *data = dev->data;
 	int ret;
 
-	if (fmt == NULL) {
-		return -EINVAL;
-	}
-
 	ret = video_set_format(cfg->source_dev, fmt);
 	if (ret < 0) {
 		return ret;

drivers/video/video_mcux_csi.c

@@ -176,10 +176,6 @@ static int video_mcux_csi_get_fmt(const struct device *dev, struct video_format
 {
 	const struct video_mcux_csi_config *config = dev->config;
 
-	if (fmt == NULL) {
-		return -EINVAL;
-	}
-
 	if (config->source_dev && !video_get_format(config->source_dev, fmt)) {
 #if defined(CONFIG_VIDEO_MCUX_MIPI_CSI2RX)
 		video_pix_fmt_convert(fmt, true);

drivers/video/video_mcux_mipi_csi2rx.c

@@ -130,10 +130,6 @@ static int mipi_csi2rx_get_fmt(const struct device *dev, struct video_format *fm
 {
 	const struct mipi_csi2rx_config *config = dev->config;
 
-	if (fmt == NULL) {
-		return -EINVAL;
-	}
-
 	if (video_get_format(config->sensor_dev, fmt)) {
 		return -EIO;
 	}

drivers/video/video_mcux_smartdma.c

@@ -220,10 +220,6 @@ static int nxp_video_sdma_set_format(const struct device *dev, struct video_form
 	const struct nxp_video_sdma_config *config = dev->config;
 	int ret;
 
-	if (fmt == NULL) {
-		return -EINVAL;
-	}
-
 	if (!device_is_ready(config->sensor_dev)) {
 		LOG_ERR("Sensor device not ready");
 		return -ENODEV;
@@ -252,10 +248,6 @@ static int nxp_video_sdma_get_format(const struct device *dev, struct video_form
 	const struct nxp_video_sdma_config *config = dev->config;
 	int ret;
 
-	if (fmt == NULL) {
-		return -EINVAL;
-	}
-
 	if (!device_is_ready(config->sensor_dev)) {
 		LOG_ERR("Sensor device not ready");
 		return -ENODEV;

drivers/video/video_stm32_dcmi.c

@@ -210,10 +210,6 @@ static int video_stm32_dcmi_get_fmt(const struct device *dev, struct video_forma
 	const struct video_stm32_dcmi_config *config = dev->config;
 	int ret;
 
-	if (fmt == NULL) {
-		return -EINVAL;
-	}
-
 	/* Align DCMI format with the one provided by the sensor */
 	ret = video_get_format(config->sensor_dev, fmt);
 	if (ret < 0) {