* config/pdp11/pdp11-protos.h, config/pdp11/pdp11.c,
	config/c4x/c4x-c.c, config/c4x/c4x-protos.h, config/c4x/c4x.c,
	config/c4x/c4x.h:
	Convert to ISO C90 function declarations and definitions.

From-SVN: r71880