for consistency, allow vesa 64-bit bars.

Reference: /n/atom/patch/applied/vesa64bitbar
Date: Sat Jan 11 19:55:24 CET 2014
Signed-off-by: quanstro@quanstro.net

--- /sys/src/9/pcpae/vgavesa.c	Sat Jan 11 19:55:05 2014
+++ /sys/src/9/pcpae/vgavesa.c	Sat Jan 11 19:55:05 2014
@@ -105,7 +105,7 @@
 	int i, mode, size;
 	char *s;
 	uchar *p;
-	ulong paddr;
+	uintmem pa;
 	Pcidev *pci;
 
 	if(hardscreen) {
@@ -128,7 +128,7 @@
 	if(!(WORD(p+0) & (1<<7)))
 		error("not in linear graphics mode");
 
-	paddr = LONG(p+40);
+	pa = LONG(p+40);
 	size = WORD(p+20)*WORD(p+16);
 	size = PGROUND(size);
 
@@ -141,7 +141,7 @@
 		if(pci->ccrb != Pcibcdisp)
 			continue;
 		for(i=0; i<nelem(pci->mem); i++)
-			if(paddr == (pci->mem[i].bar&~0x0F)){
+			if(pa == (pci->mem[i].bar&~(uintmem)0xf)){
 				if(pci->mem[i].size > size)
 					size = pci->mem[i].size;
 				goto havesize;
@@ -155,7 +155,7 @@
 		size = ROUND(size, 1024*1024);
 
 havesize:
-	vgalinearaddr(scr, paddr, size);
+	vgalinearaddr(scr, pa, size);
 	if(scr->apsize)
 		addvgaseg("vesascreen", scr->paddr, scr->apsize);