Only compile m48t59 when one target uses it

Patchworks-ID: 35204
Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/default-configs/ppc64-softmmu.mak b/default-configs/ppc64-softmmu.mak
index e04d2c5..d56f5c2 100644
--- a/default-configs/ppc64-softmmu.mak
+++ b/default-configs/ppc64-softmmu.mak
@@ -4,3 +4,4 @@
 CONFIG_USB_OHCI=y
 CONFIG_ISA_MMIO=y
 CONFIG_ESCC=y
+CONFIG_M48T59=y