* (struct remote_state): New type, only containing

	* (struct remote_state): New type, only containing
	buf and buf_size.
	(remote_state): New variable.
	(get_remote_state): New function.
	(struct remote_arch_state): Renamed from struct remote_state.
	Removed buf and buf_size.
	(get_remote_arch_state): Renamed from get_remote_state.  All
	necessary callers updated to call this function.
	(init_remote_state): Initialize the architecture-specific state.
	Update the target-specific state if necessary.
	(get_remote_packet_size): New function.  All previous references
	changed to use this accessor function.
	(packet_reg_from_regnum, packet_reg_from_pnum): Take a
	remote_arch_state instead of a remote_state.  All callers changed.
	(_initialize_remote): Initialize the packet buffer here.