update all struct headers to be more "standardized":
- bit fields are properly wrapped with struct
- bitwidth sum should be 32 within same struct, so that it's correctly padded with reserved bits
- bit field should be uint32_t
- typedef volatile struct xxx{} yyy;: xxx must exists. refer: https://github.com/espressif/esp-idf/pull/3199
added helper macros to force peripheral registers being accessed in 32 bitwidth
added a check script into ci
* sync the latest struct header file from ESP32
* add soc_caps.h macros to distinguish between IO MUX and GPIO Matrix
support in SDMMC on different chips.
* store GPIO matrix signal numbers in sdmmc_slot_info_t