Deprecating a #define(s) w/dtc

[Kumar Gala <kumar.gala@xxxxxxxxxx>]

Is there some operator/function we could define to be able to flag deprecated defines.

For example with gcc we can do:

#define __DEPRECATED_MACRO _Pragma("GCC warning \"Macro is deprecated\”")

So something like:

	clock-frequency = < /deprecate/ I2C_BITRATE_STANDARD 100000 >;

- k