* config/tc-hppa.c: Change all occurences of pa-89 with pa-11 to

	* config/tc-hppa.c: Change all occurences of pa-89 with pa-11 to
	be consistent with current naming conventions.
	(md_begin): Set a default architecture and machine type.
	(pa_ip): If the current instruction specifies a newer machine type
	than the current machine type, then update the current machine
	type.
	(need_pa11_opcode): Likewise.