add a WH_MESSAGE_GROUP_MAX and use it to get the number of groups

Author: JacobBarthelmeh

wolfhsm/wh_message.h

@@ -48,11 +48,12 @@ enum WH_MESSAGE_ENUM {
     WH_MESSAGE_GROUP_CRYPTO_DMA = 0x0B00, /* DMA crypto operations */
     WH_MESSAGE_GROUP_CERT       = 0x0C00, /* Certificate operations */
     WH_MESSAGE_GROUP_AUTH       = 0x0D00, /* Authentication and authorization */
+    WH_MESSAGE_GROUP_MAX        = 0x0D00, /* Last group in list */
 
     WH_MESSAGE_ACTION_MASK = 0x00FF, /* 255 subtypes per group*/
     WH_MESSAGE_ACTION_NONE = 0x0000, /* No action. Invalid. */
 };
-#define WH_NUMBER_OF_GROUPS 14
+#define WH_NUMBER_OF_GROUPS ((WH_MESSAGE_GROUP_MAX >> 8) + 1)
 
 /* keystore actions */
 enum WH_KEY_ENUM {