* config/tc-cris.c: Update all comments regarding explicit relocations

	* config/tc-cris.c: Update all comments regarding explicit relocations
	to, besides PIC, also imply TLS or to say "relocation specifier" or
	similar.
	(RELOC_SUFFIX_CHAR): Rename from PIC_SUFFIX_CHAR.  Change all callers.
	(cris_get_reloc_suffix): Rename from cris_get_pic_suffix.  Change all
	callers.  Also handle TLS relocs.
	(cris_get_specified_reloc_size): Rename from cris_get_pic_reloc_size.
	Change all callers.  Also handle TLS relocs.
	(tls): New constant.
	(cris_process_instruction): Check for non-PIC TLS relocations and
	adjust message when emitting error message about relocation not
	fitting.
	(get_autoinc_prefix_or_indir_op): Also check for relocation suffix
	when tls is true.
	(get_3op_or_dip_prefix_op): Ditto.
	(cris_number_to_imm, tc_gen_reloc): Handle TLS relocs like PIC relocs.