configure: Mark SPARC as supported

Thanks to John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
and the Debian Project, we now have access to a SPARC Linux
system we can use for build testing. Move SPARC back into
the "supported" list.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1490698718-23762-1-git-send-email-peter.maydell@linaro.org

configure

@@ -521,11 +521,11 @@ ARCH=
 # Normalise host CPU name and set ARCH.
 # Note that this case should only have supported host CPUs, not guests.
 case "$cpu" in
-  ppc|ppc64|s390|s390x|x32)
+  ppc|ppc64|s390|s390x|sparc64|x32)
     cpu="$cpu"
     supported_cpu="yes"
   ;;
-  ia64|sparc64)
+  ia64)
     cpu="$cpu"
   ;;
   i386|i486|i586|i686|i86pc|BePC)
@@ -550,6 +550,7 @@ case "$cpu" in
   ;;
   sparc|sun4[cdmuv])
     cpu="sparc"
+    supported_cpu="yes"
   ;;
   *)
     # This will result in either an error or falling back to TCI later