esp: enable for all PCI machines

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/default-configs/pci.mak b/default-configs/pci.mak
index 4b49c00..9febb47 100644
--- a/default-configs/pci.mak
+++ b/default-configs/pci.mak
@@ -17,3 +17,4 @@
 CONFIG_IDE_QDEV=y
 CONFIG_IDE_PCI=y
 CONFIG_AHCI=y
+CONFIG_ESP=y