clean up a few nits
- 82563, need sfence to eliminate the race between pci mmio and memory
(this was never seen to be a problem, but it was not correct).  also, bme needs
to be set earlier.
- portfns.h: mfence is gone; remove definition.
- devpci.c: fix debug print type mismatch.

Reference: /n/atom/patch/applied2013/nixnits20130921
Date: Sat Sep 21 16:50:02 CES 2013
Signed-off-by: quasntro@quanstro.net

--- /sys/src/nix/port/devpci.c	Sat Sep 21 16:48:00 2013
+++ /sys/src/nix/port/devpci.c	Sat Sep 21 16:48:00 2013
@@ -196,7 +196,7 @@
 		for(i=0; i<nelem(p->mem); i++){
 			if(p->mem[i].size == 0)
 				continue;
-			w = seprint(w, ebuf, " %d:%.8ux %d", i, p->mem[i].bar, p->mem[i].size);
+			w = seprint(w, ebuf, " %d:%#P %d", i, p->mem[i].bar, p->mem[i].size);
 		}
 		*w++ = '\n';
 		*w = '\0';
--- /sys/src/nix/port/portfns.h	Sat Sep 21 16:48:00 2013
+++ /sys/src/nix/port/portfns.h	Sat Sep 21 16:48:00 2013
@@ -190,6 +190,7 @@
 ulong		ms2tk(ulong);
 void		mul64fract(uvlong*, uvlong, uvlong);
 void		muxclose(Mnt*);
+void		(*mwait)(void *);
 Chan*		namec(char*, int, int, int);
 void		nameerror(char*, char*);
 Chan*		newchan(void);
--- /sys/src/nix/k10/ether82563.c	Sat Sep 21 16:48:00 2013
+++ /sys/src/nix/k10/ether82563.c	Sat Sep 21 16:48:01 2013
@@ -1089,6 +1089,7 @@
 		ctlr->rdfree++;
 	}
 	if(i != 0){
+		sfence();
 		ctlr->rdt = rdt;
 		csr32w(ctlr, Rdt, rdt);
 	}
@@ -2032,6 +2033,7 @@
 		return -1;
 	}
 	p = ctlr->pcidev;
+	pcisetbme(ctlr->pcidev);
 	ctlr->nic = vmap(ctlr->port, p->mem[0].size);
 	if(ctlr->nic == nil){
 		print("%s: can't map %#P\n", cname(ctlr), ctlr->port);
@@ -2041,7 +2043,6 @@
 		vunmap(ctlr->nic, p->mem[0].size);
 		return -1;
 	}
-	pcisetbme(ctlr->pcidev);
 	return 0;
 }