targets/fcdev3b.h: bring back CONFIG_TARGET_FCDEV3B C preprocessor symbol CONFIG_TARGET_FCMODEM is no longer used anywhere in our code base, thus it is being fully retired. OTOH, CONFIG_TARGET_FCDEV3B is being brought back: with our earlier FC modem family idea now being withdrawn in light of the discovery of Tango modules, FCDEV3B goes back to being its own unique target.

#ifndef __INDEPENDANCE_H_
#define __INDEPENDANCE_H_

#define R2D_FREE(p) rvf_free_buf((void*)(p))
#define R2D_MALLOC(id,t,s,p) rvf_get_buf(id, s, (T_RVF_BUFFER**)&p)
#endif