Since the transition to Xserver 1.12, the standard vgaHW layer

that depends on libpciaccess and is broken on macppc, so use
vgaHWSetMmioFuncs() instead of vgaHWSetStdFuncs() and unbreak
the nv driver on this platfrom.

ok matthieu@

driver/xf86-video-nv/src/nv_driver.c

@@ -1785,7 +1785,11 @@ NVPreInit(ScrnInfoPtr pScrn, int flags)
     }
     xf86DrvMsg(pScrn->scrnIndex, from, "MMIO registers at 0x%lX\n",
 	       (unsigned long)pNv->IOAddress);
-     
+
+#if defined(__powerpc__)
+    vgaHWSetMmioFuncs(VGAHWPTR(pScrn), (CARD8 *)pNv->IOAddress, 0);
+#endif
+
 #ifndef XSERVER_LIBPCIACCESS
     if (xf86RegisterResources(pNv->pEnt->index, NULL, ResExclusive)) {
 	xf86DrvMsg(pScrn->scrnIndex, X_ERROR,