UBUNTU: [Config] do_zfs_powerpc64-smp use default value

Signed-off-by: Andy Whitcroft <apw@canonical.com>

debian.master/rules.d/powerpc.mk

@@ -32,7 +32,7 @@ do_tools_perf		= true
 # override still has priority.
 do_zfs			= true
 do_zfs_powerpc-smp	= false
-do_zfs_powerpc64-smp	= true
+# do_zfs_powerpc64-smp	= true
 do_zfs_powerpc-e500mc	= false
 do_zfs_powerpc64-emb	= false