drivers: sensor: nxp: kinetis: temp: fix memset() length

Use the correct buffer size when calling memset().

Fixes: #73093

Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>
(cherry picked from commit 59402fd)

drivers/sensor/nxp_kinetis_temp/temp_kinetis.c

@@ -159,7 +159,7 @@ static int temp_kinetis_init(const struct device *dev)
  },
  };
 
- memset(&data->buffer, 0, ARRAY_SIZE(data->buffer));
+ memset(&data->buffer, 0, sizeof(data->buffer));
 
  if (!device_is_ready(config->adc)) {
  LOG_ERR("ADC device is not ready");