hw_auth_token: use macro for HW_AUTH_TOKEN_VERSION

This is to support FPC SW20.6

Bug: 33251689
Change-Id: I9abbf7f9d21c7c8ed21920d94fcf5bf889d4b3f7
diff --git a/include/hardware/hw_auth_token.h b/include/hardware/hw_auth_token.h
index f471d1a..3305f2c 100644
--- a/include/hardware/hw_auth_token.h
+++ b/include/hardware/hw_auth_token.h
@@ -23,7 +23,7 @@
 extern "C" {
 #endif  // __cplusplus
 
-const uint8_t HW_AUTH_TOKEN_VERSION = 0;
+#define HW_AUTH_TOKEN_VERSION 0
 
 typedef enum {
     HW_AUTH_NONE = 0,