diskconfig: Add missing include for loff_t

Change-Id: I76375bfaf3dbab0724fe0be05f7c1172e49287f4
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
diff --git a/include/diskconfig/diskconfig.h b/include/diskconfig/diskconfig.h
index d4f468c..d45b99e 100644
--- a/include/diskconfig/diskconfig.h
+++ b/include/diskconfig/diskconfig.h
@@ -19,6 +19,7 @@
 #define __LIBS_DISKCONFIG_H
 
 #include <stdint.h>
+#include <sys/types.h>
 
 #ifdef __cplusplus
 extern "C" {