refactor!: make struct rte_kvargs_pair and struct rte_kvargs private

lib/kvargs/rte_kvargs.c

@@ -11,6 +11,19 @@
 
 #include "rte_kvargs.h"
 
+/** A key/value association */
+struct rte_kvargs_pair {
+	char *key;      /**< the name (key) of the association  */
+	char *value;    /**< the value associated to that key */
+};
+
+/** Store a list of key/value associations */
+struct rte_kvargs {
+	char *str;      /**< copy of the argument string */
+	unsigned count; /**< number of entries in the list */
+	struct rte_kvargs_pair pairs[RTE_KVARGS_MAX]; /**< list of key/values */
+};
+
 /*
  * Receive a string with a list of arguments following the pattern
  * key=value,key=value,... and insert them into the list.

lib/kvargs/rte_kvargs.h

@@ -49,18 +49,8 @@ extern "C" {
  */
 typedef int (*arg_handler_t)(const char *key, const char *value, void *opaque);
 
-/** A key/value association */
-struct rte_kvargs_pair {
-	char *key;      /**< the name (key) of the association  */
-	char *value;    /**< the value associated to that key */
-};
-
 /** Store a list of key/value associations */
-struct rte_kvargs {
-	char *str;      /**< copy of the argument string */
-	unsigned count; /**< number of entries in the list */
-	struct rte_kvargs_pair pairs[RTE_KVARGS_MAX]; /**< list of key/values */
-};
+struct rte_kvargs;
 
 /**
  * Allocate a rte_kvargs and store key/value associations from a string