The def command Indicates that a comment block contains documentation
for a #define macro. This is useful if the comment block documents a
macro not adjacent to it, e.g.
```c
/**
* @def MAX(x,y)
* @brief Computes the maximum of @a x and @a y.
*/
#ifdef XXX
#define MAX(x,y) ...
#endif
```
However, it is not necessary if the comment is adjacent to the
definition, e.g.
```c
/**
* @brief Computes the maximum of @a x and @a y.
*/
#define MAX(x,y) ...
```
This patch removes all unnecessary def entries in-tree.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
a7c3e7e84a