1. add tim1/2/3/4/5/8 pwm driver and test pass by self.

[AT32] 完善ADC驱动

1. Calibration is required when ADC is enabled, and calibration is not required when enabling
ADC.
2. format code style

[add] N32G452 BSP

1. 添加PWM测试代码
2. 修正PWM驱动周期与脉冲错误问题

1. ref https://github.com/mysterywolf/formatting

1. UART 1-3 验证通过
2. ADC 1-2 CH 6-9 验证通过
3. TIM 6-7 验证通过

1. 部分驱动已经整改,但未验证
2. 根据AT32整改目录结构