Really fix sparc on 64-bit kernel/32-bit userland.

Commit b3a3020 used a sparc64 ifdef instead of
sparc. But for 32-bit userland, __sparc64__ is not defined so the wrong code is
used.
(cherry picked from d812f48 commit)

hw/xfree86/os-support/bus/linuxPci.c

@@ -85,7 +85,7 @@ static pciBusFuncs_t linuxFuncs0 = {
 /* pciAddrHostToBus */	pciAddrNOOP,
 /* linuxTransAddrBusToHost is busted on sparc64 but the PCI rework tree
  * makes it all moot, so we kludge it for now */
-#if defined(__sparc64__)
+#if defined(__sparc__)
 /* pciAddrBusToHost */  pciAddrNOOP,
 #else
 /* pciAddrBusToHost */	linuxTransAddrBusToHost,