UBUNTU: [Config] powerpc -- convert zfs configuration to custom_override

BugLink: http://bugs.launchpad.net/bugs/1558871Signed-off-by: Andy Whitcroft <apw@canonical.com>

debian.master/control.d/vars.powerpc64-smp

@@ -4,4 +4,3 @@ desc="64-bit PowerPC SMP"
 bootloader="yaboot"
 provides="redhat-cluster-modules, ivtv-modules"
 arch="powerpc"
-do_zfs=true

debian.master/rules.d/powerpc.mk

@@ -28,4 +28,12 @@ do_tools_usbip          = true
 do_tools_cpupower	= true
 do_tools_perf		= true
 
+# Default to true and disable to ensure that the crossbuild
+# override still has priority.
+do_zfs			= true
+do_zfs_powerpc-smp	= false
+#do_zfs_powerpc64-smp	= true
+do_zfs_powerpc-e500mc	= false
+do_zfs_powerpc64-emb	= false
+
 family			= ubuntu