Changes to add dollar prefix to registers for files where user symbols

	Changes to add dollar prefix to registers for files where user symbols
	don't have a leading underscore.  Fix formatting.
	* cris-dis.c (REGISTER_PREFIX_CHAR): New.
	(format_reg): Add parameter with_reg_prefix.  All callers changed.
	(print_with_operands): Ditto.
	(print_insn_cris_generic): Renamed from print_insn_cris, add
	parameter with_reg_prefix.
	(print_insn_cris_with_register_prefix,
	print_insn_cris_without_register_prefix, cris_get_disassembler):
	New.
	* disassemble.c (disassembler) [ARCH_cris]: Call cris_get_disassembler.