[PATCH net-next] fib: Fix undef compile warning

[YueHaibing]

net/core/fib_rules.c:26:7: warning: "CONFIG_IP_MULTIPLE_TABLES" is not defined, evaluates to 0 [-Wundef]
 #elif CONFIG_IP_MULTIPLE_TABLES
       ^~~~~~~~~~~~~~~~~~~~~~~~~

Fixes: 8b66a6fd34f5 ("fib: fix another fib_rules_ops indirect call wrapper problem")
Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
---
 net/core/fib_rules.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c
index a7a3f500a857..51678a528f85 100644
--- a/net/core/fib_rules.c
+++ b/net/core/fib_rules.c
@@ -23,7 +23,7 @@
 #else
 #define INDIRECT_CALL_MT(f, f2, f1, ...) INDIRECT_CALL_1(f, f2, __VA_ARGS__)
 #endif
-#elif CONFIG_IP_MULTIPLE_TABLES
+#elif defined(CONFIG_IP_MULTIPLE_TABLES)
 #define INDIRECT_CALL_MT(f, f2, f1, ...) INDIRECT_CALL_1(f, f1, __VA_ARGS__)
 #else
 #define INDIRECT_CALL_MT(f, f2, f1, ...) f(__VA_ARGS__)
-- 
2.17.1