since the Vkey now contains a Pci*, there's no need to pass in an extra pointer

Reference: /n/atom/patch/applied/ioapic-pciinvkey
Date: Sat Sep  5 21:16:55 CES 2015
Signed-off-by: quanstro@quanstro.net

--- /sys/src/nix/k10/ioapic.c	Sat Sep  5 21:16:36 2015
+++ /sys/src/nix/k10/ioapic.c	Sat Sep  5 21:16:38 2015
@@ -432,16 +432,13 @@
 static int
 msimask(Vkey *v, int mask)
 {
-	Pcidev *p;
-
-	p = pcimatchtbdf(v->tbdf);
-	if(p == nil)
+	if(v->p == nil)
 		return -1;
-	return pcimsimask(p, mask);
+	return pcimsimask(v->p, mask);
 }
 
 static int
-intrenablemsi(Vctl* v, Pcidev *p)
+intrenablemsi(Vctl* v)
 {
 	u32int lo, hi;
 	u64int msivec;
@@ -450,64 +447,59 @@
 	ioapicphysdd(v, &hi, &lo);
 
 	msivec = (u64int)hi<<32 | lo;
-	if(pcimsienable(p, msivec) == -1)
+	if(pcimsienable(v->p, msivec) == -1)
 		return -1;
 	v->eoi = lapiceoi;
 	v->type = "msi";
 	v->mask = msimask;
 
-	DBG("msiirq: %T: enabling %.16llux %s vno %d\n", p->tbdf, msivec, v->name, v->vno);
+	DBG("msiirq: %T: enabling %.16llux %s vno %d\n", v->p->tbdf, msivec, v->name, v->vno);
 	return v->vno;
 }
 
 int
-disablemsi(Vctl*, Pcidev *p)
+disablemsi(Vctl *v)
 {
-	if(p == nil)
+	if(v->p == nil)
 		return -1;
-	return pcimsimask(p, 1);
+	return pcimsimask(v->p, 1);
 }
 
 static int
 msixmask(Vkey *v, int mask)
 {
-	Pcidev *p;
-
-	p = pcimatchtbdf(v->tbdf);
-	if(p == nil)
-		return -1;
-	return pcimsixmask(p, mask);
+	return pcimsixmask(v->p, mask);
 }
 
 static int
-intrenablemsix(Vctl* v, Pcidev *p)
+intrenablemsix(Vctl* v)
 {
 	u32int lo, hi;
 	u64int msivec;
 
-	if((v->flag&Vmsix) == 0 || p == nil)
+	if((v->flag&Vmsix) == 0)
 		return -1;
 	lo = IPlow | TMedge;
 
 	ioapicphysdd(v, &hi, &lo);
 	msivec = (u64int)hi<<32 | lo;
-	if(pcimsixenable(p, msivec) == -1)
+	if(pcimsixenable(v->p, msivec) == -1)
 		return -1;
 	v->eoi = lapiceoi;
 	v->type = "msi-x";
 	v->mask = msixmask;
 
 	print("msix: %T: enabling %.16llux %s vno %d affinity %d\n",
-		p->tbdf, msivec, v->name, v->vno, v->affinity);
+		v->p->tbdf, msivec, v->name, v->vno, v->affinity);
 	return v->vno;
 }
 
 int
-disablemsix(Vctl *v, Pcidev *p)
+disablemsix(Vctl *v)
 {
-	if((v->flag&Vmsix) == 0 || p == nil)
+	if((v->flag&Vmsix) == 0)
 		return -1;
-	return pcimsixmask(p, 1);
+	return pcimsixmask(v->p, 1);
 }
 
 int
@@ -608,12 +600,12 @@
 		if((p = pcimatchtbdf(v->tbdf)) == nil)
 			panic("ioapic: no pci dev for tbdf %T", v->tbdf);
 		v->p = p;
-		if(intrenablemsix(v, p) != -1)
+		if(intrenablemsix(v) != -1)
 			return v->vno;
-		disablemsix(v, p);
-		if(intrenablemsi(v, p) != -1)
+		disablemsix(v);
+		if(intrenablemsi(v) != -1)
 			return v->vno;
-		disablemsi(v, p);
+		disablemsi(v);
 		if((devno = pcicfgr8(p, PciINTP)) == 0){
 			print("ioapicintrenable: no intp for %T\n", v->tbdf);
 			return -1;