* [bsp][lpc55sxx] update spi driver

1. update spi driver, fix pin driver
2. move DMA_Init to board.c

* [bsp][lpc55sxx] formmat code

* [bsp][lpc55sxx] format lpc55s69_nxp_evk board file

修复spi通过env配置选中之后没有使能的问题，修改spi获取时钟源的API，修改cs脚无效的问题；
修复pwm不能修改频率和占空比的问题，修改pwm获取时钟源的API解决PWM频率和占空比不正确的问题。

添加一个status，判断I2C执行结果来修复i2c传输始终正确的BUG。

rt_ssize_t can give negative error code, which follows the unix style correctly

* [bsp_lpc55sxx] i2c,rtc bsp update

1. add i2c DMA mode
2. enable rtc driver

* [bsp_lpc55sxx] formmat code

using formmating.py for format code

* [lpc55sxx] remove .gitignore

* [bsp][lpc55sxx] update bsp driver

1. update sdif driver, enable DFS, FAT32
2. update rtc driver

* [bsp_lpc55sxx] i2c,rtc bsp update

update NXP SDK to 2_12_0

* [rtc] use gmtime_r to replace gmtime