x86: add missing symbol to xen_domu

Signed-off-by: John Crispin <[email protected]>

SVN-Revision: 45016

target/linux/x86/xen_domu/config-default

@@ -79,6 +79,7 @@ CONFIG_XEN_PRIVCMD=m
 CONFIG_XEN_PVHVM=y
 CONFIG_XEN_SAVE_RESTORE=y
 CONFIG_XEN_SCRUB_PAGES=y
+CONFIG_XEN_SCSI_FRONTEND=y
 CONFIG_XEN_SYS_HYPERVISOR=y
 # CONFIG_XEN_WDT is not set
 CONFIG_XEN_XENBUS_FRONTEND=y