hw: move watchdogs to hw/watchdog, configure via default-configs/

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/default-configs/i386-softmmu.mak b/default-configs/i386-softmmu.mak
index e041a63..7dd0669 100644
--- a/default-configs/i386-softmmu.mak
+++ b/default-configs/i386-softmmu.mak
@@ -29,3 +29,4 @@
 CONFIG_TPM_TIS=y
 CONFIG_TPM_PASSTHROUGH=y
 CONFIG_PCI_HOTPLUG=y
+CONFIG_WDT_IB700=y