Update field types for Chip Data Files

Change-Id: I5cc76401f97121a1fa4f9cb669d7241113075d8b
Signed-off-by: Zane Shelley <zshelle@us.ibm.com>
diff --git a/test/simulator/simulator.hpp b/test/simulator/simulator.hpp
index ccb998a..0a22911 100644
--- a/test/simulator/simulator.hpp
+++ b/test/simulator/simulator.hpp
@@ -221,8 +221,8 @@
 #define EXP_SIG(CHIP, ID, INST, BIT, TYPE)                                     \
     simData.addSignature(libhei::Signature{                                    \
         CHIP, static_cast<libhei::RegisterId_t>(ID),                           \
-        static_cast<libhei::RegisterInstance_t>(INST),                         \
-        static_cast<libhei::RegisterBit_t>(BIT), libhei::ATTN_TYPE_##TYPE});
+        static_cast<libhei::Instance_t>(INST),                                 \
+        static_cast<libhei::BitPosition_t>(BIT), libhei::ATTN_TYPE_##TYPE});
 
 /**
  * This is the end of an iteration that began with START_ITERATION. All of the