Using xxx_periph.h in whole IDF instead of xxx_reg.h, xxx_struct.h, xxx_channel.h ... .
Cleaned up header files from unnecessary headers (releated to soc/... headers).
This fix is for compatibility with lwip_select(). It moves the lock to
UART which is the only VFS driver which is implemented and is not
"thread-safe".
When using multiple sockets, some of them could be incorrectly removed
from the fd_sets before passing these fd_sets forward to the socket
select function.
Closes https://github.com/espressif/esp-idf/issues/1987
