csky bfd.h tidy
    
    bfd/
    	* bfd-in.h: Move csky function declarations to..
    	* elf32-csky.h: ..here, new file.
    	* elf32-csky.c: Include elf32-csky.h.
    	* bfd-in2.h: Regenerate.
    ld/
    	* emultempl/cskyelf.em: Include elf32-csky.h.