* [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