Fix lock/ilock mismatch.
 [rsc] --rw-rw-r-- M 8988 glenda sys 12365 Nov 21 07:08 sys/src/9/pc/kbd.c
	/n/sourcesdump/2005/1121/plan9/sys/src/9/pc/kbd.c:317,326 - 
	/n/sourcesdump/2005/1122/plan9/sys/src/9/pc/kbd.c:317,326
	  	/*
	  	 *  get status
	  	 */
	- 	lock(&i8042lock);
	+ 	ilock(&i8042lock);
	  	s = inb(Status);
	  	if(!(s&Inready)){
	- 		unlock(&i8042lock);
	+ 		iunlock(&i8042lock);
	  		return;
	  	}
	  
	/n/sourcesdump/2005/1121/plan9/sys/src/9/pc/kbd.c:328,334 - 
	/n/sourcesdump/2005/1122/plan9/sys/src/9/pc/kbd.c:328,334
	  	 *  get the character
	  	 */
	  	c = inb(Data);
	- 	unlock(&i8042lock);
	+ 	iunlock(&i8042lock);
	  
	  	/*
	  	 *  if it's the aux port...