Add startup script for frame TMR-6A, The material is extracted from "3DR ArduCopter Hexa B" (https://pixhawk.ethz.ch/px4/airframes/3dr_arducopter_hexa_b)

Disable auto startup settings in rcS, instead of it, we can type "sh /etc/init.d/rc.start" in NSH to do auto startup stuffs.

Signed-off-by: cctsao1008 <chiacheng.tsao@gmail.com>
ROMFS stuffs.

Signed-off-by: cctsao1008 <chiacheng.tsao@gmail.com>
Disable  CONFIG_DEBUG_I2C.

Signed-off-by: cctsao1008 <chiacheng.tsao@gmail.com>
Fix tests ppm cannot works.

Signed-off-by: cctsao1008 <chiacheng.tsao@gmail.com>
Remove GPIO_TIM2_CH1OUT settings.

Signed-off-by: cctsao1008 <chiacheng.tsao@gmail.com>
Configure the ADC GPIO settings for TMRFC and add channels for Vbat and Temp, P-meter, LiPo voltage detect.

Signed-off-by: cctsao1008 <chiacheng.tsao@gmail.com>
Configure GPS path for TMR-FC.

Signed-off-by: cctsao1008 <chiacheng.tsao@gmail.com>
Change PWM control settings.

Signed-off-by: cctsao1008 <chiacheng.tsao@gmail.com>
Remove complain message "attitude estimator ekf sensor data missed!" , This  problem is  caused by using I2C GYRO and ACC. I2C bus is too busy.

Signed-off-by: cctsao1008 <chiacheng.tsao@gmail.com>