add ownlock and friends to portfns, and remove _xinc and friends

Reference: /n/atom/patch/applied/ownlockdefn
Date: Fri Jun  6 18:40:32 CES 2014
Signed-off-by: quanstro@quanstro.net

--- /sys/src/9/port/portfns.h	Fri Jun  6 18:40:26 2014
+++ /sys/src/9/port/portfns.h	Fri Jun  6 18:40:27 2014
@@ -161,6 +161,8 @@
 ulong		l2be(long);
 long		latin1(Rune*, int);
 int		lock(Lock*);
+uintptr		lockgetpc(Lock*);
+void		locksetpc(Lock*, uintptr);
 void		logopen(Log*);
 void		logclose(Log*);
 char*		logctl(Log*, int, char**, Logflag*);
@@ -211,6 +213,7 @@
 uvlong		ns2fastticks(uvlong);
 int		okaddr(ulong, ulong, int);
 int		openmode(ulong);
+int		ownlock(Lock*);
 Block*		packblock(Block*);
 Block*		padblock(Block*, int);
 void		pagechainhead(Page*);
@@ -406,8 +409,6 @@
 uint		nhgetl(void*);
 ushort		nhgets(void*);
 ulong		µs(void);
-void		_xinc(long*);
-long		_xdec(long*);
 long		lcycles(void);
 
 #pragma	varargck	argpos	panic		1