Staging: lustre: ptlrpc: Declare sptlrpc_rule_set_free as static

Declare sptlrpc_rule_set_free as static since it is accessed from this
particular file only. Also remove its declaration from
header file
Signed-off-by: Shraddha Barke <shraddha.6596@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/include/lustre_sec.h

@@ -329,7 +329,6 @@ static inline void sptlrpc_rule_set_init(struct sptlrpc_rule_set *set)
 	memset(set, 0, sizeof(*set));
 }
 
-void sptlrpc_rule_set_free(struct sptlrpc_rule_set *set);
 int  sptlrpc_rule_set_expand(struct sptlrpc_rule_set *set);
 int sptlrpc_rule_set_choose(struct sptlrpc_rule_set *rset,
 			    enum lustre_sec_part from,

drivers/staging/lustre/lustre/ptlrpc/sec_config.c

@@ -215,7 +215,7 @@ int sptlrpc_parse_rule(char *param, struct sptlrpc_rule *rule)
 }
 EXPORT_SYMBOL(sptlrpc_parse_rule);
 
-void sptlrpc_rule_set_free(struct sptlrpc_rule_set *rset)
+static void sptlrpc_rule_set_free(struct sptlrpc_rule_set *rset)
 {
 	LASSERT(rset->srs_nslot ||
 		(rset->srs_nrule == 0 && rset->srs_rules == NULL));
@@ -225,7 +225,6 @@ void sptlrpc_rule_set_free(struct sptlrpc_rule_set *rset)
 		sptlrpc_rule_set_init(rset);
 	}
 }
-EXPORT_SYMBOL(sptlrpc_rule_set_free);
 
 /*
  * return 0 if the rule set could accommodate one more rule.