Standardized preprocessor macro indentation & function { placement for readability.

[diamondman]

The files had many mixed styles. This PR identifies the project's most common style (for macro indentation and function curly brace placements) and applies it to the whole project.

#ifndef THING1
#  ifdef THING2
#    define SOMETHING
#  endif // THING1
#endif // THING2

[diamondman]

This PR is one of the first of several that will attempt to allow ptpd to be used in less posix standard OSs like FreeRTOS. standardizing the preprocessor indentations made it a lot easier to see how the code is connected.