clean up some small nix/k10 nits

Reference: /n/atom/patch/applied2013/nixnits20130822
Date: Fri Aug 23 05:06:59 CES 2013
Signed-off-by: quanstro@quanstro.net

--- /sys/src/nix/k10/pci.c	Fri Aug 23 05:05:12 2013
+++ /sys/src/nix/k10/pci.c	Fri Aug 23 05:05:13 2013
@@ -283,7 +283,7 @@
 	return maxubn;
 }
 
-static uchar 
+static uchar
 pIIxget(Pcidev *router, uchar link)
 {
 	uchar pirq;
@@ -293,13 +293,13 @@
 	return (pirq < 16)? pirq: 0;
 }
 
-static void 
+static void
 pIIxset(Pcidev *router, uchar link, uchar irq)
 {
 	pcicfgw8(router, link, irq);
 }
 
-static uchar 
+static uchar
 viaget(Pcidev *router, uchar link)
 {
 	uchar pirq;
@@ -310,7 +310,7 @@
 	return (link & 1)? (pirq >> 4): (pirq & 15);
 }
 
-static void 
+static void
 viaset(Pcidev *router, uchar link, uchar irq)
 {
 	uchar pirq;
@@ -327,7 +327,7 @@
 	ushort	vid;
 	ushort	did;
 	uchar	(*get)(Pcidev *, uchar);
-	void	(*set)(Pcidev *, uchar, uchar);	
+	void	(*set)(Pcidev *, uchar, uchar);
 };
 
 static Bridge southbridges[] = {
@@ -374,8 +374,8 @@
 	Router *r;
 	Slot *e;
 
-	// Search for PCI interrupt routing table in BIOS
-	for(p = (uchar *)KADDR(0xf0000); p < (uchar *)KADDR(0xfffff); p += 16)
+	/* Search for PCI interrupt routing table in BIOS */
+	for(p = (uchar*)KADDR(0xf0000); p < (uchar*)KADDR(0xfffff); p += 16)
 		if(p[0] == '$' && p[1] == 'P' && p[2] == 'I' && p[3] == 'R')
 			break;
 
@@ -426,7 +426,7 @@
 			if(pci == nil)
 				continue;
 			pin = pcicfgr8(pci, PciINTP);
-			if(pin == 0 || pin == 0xff) 
+			if(pin == 0 || pin == 0xff)
 				continue;
 
 			map = &e->maps[(pin - 1) * 3];
@@ -505,7 +505,7 @@
 			continue;
 		/*
 		 * If we have found a PCI-to-Cardbus bridge, make sure
-		 * it has no valid mappings anymore.  
+		 * it has no valid mappings anymore.
 		 */
 		for(p = pciroot; p != nil; p = p->link){
 			if (p->ccrb == 6 && p->ccru == 7) {
--- /sys/src/nix/k10/usbohci.c	Fri Aug 23 05:05:15 2013
+++ /sys/src/nix/k10/usbohci.c	Fri Aug 23 05:05:17 2013
@@ -2481,7 +2481,6 @@
 	hcca = lomallocalign(sizeof(Hcca), 256);
 	if(hcca == nil)
 		panic("usbhreset: no memory for Hcca");
-	memset(hcca, 0, sizeof(*hcca));
 	ctlr->hcca = hcca;
 
 	mkqhtree(ctlr);