* PKE testing was driven by SCEI "test0" bucket; code coverage remains

* PKE testing was driven by SCEI "test0" bucket; code coverage remains
  effectively full.  The code is believed to be functionally complete now.
  Some code cleanup is included at no extra charge in this version.

Fri Mar 13 20:21:57 1998  Frank Ch. Eigler  <fche@cygnus.com>

	* sky-vu1.c: (dump_mem): Commented out function to satiate
 	warning-ful compilation.

	* sky-pke.c: (pke_reset): New function, called explicitly at
 	initialization and at FBRST.
	(pke_fifo_flush): New function to flush (skip over) existing
 	quadwords in FIFO.
	(pke_fifo_fit): New function to add space for new quadword in
 	FIFO.
	(pke_fifo_access): New function to absolute-index into FIFO.
	(pke_fifo_old): New function to remove old quadwords from FIFO.
	(pke_begin_interrupt_stall): New function to abstract
 	interrupt-caused stalls.
	(pke_*): Access PKE FIFO only thorugh pke_fifo functions.
	(pke_pcrel_*): Renamed pke_pc_* functions.
	(pke_code_unpack): Numerous logic tweaks for latest UNPACK
 	behavior changes & clarifications from SCEI.

	* sky-pke.h (struct pke_fifo): New explicit FIFO representation.
	(struct pke_device): Use struct above.
	(PKE_DEBUG): Removed macro as misnomer.

	* sky-hardware.c: Moved *_cmd_install declarations out.

	* sky-hardware.h: Moved *_cmd_install declarations in.