Mtk平台Camera Sensor添加mipi_pixel_rate属性
（1）添加原因在使用Camera的时候Log中总出现如下相关Error：12-25 15:11:09.606250 749 17060 E MtkCam/HalSensor: [sendCommand] SENSOR_CMD_GET_SENSOR_PIXELMODE: mipi pixel rate should not be 0 (sendCommand){#628:vendor/mediatek/proprietary/hardware/mtkcam/drv/src/sensor/mt6
