ipv4: fix definition of FIB_TABLE_HASHSZ

a long time ago by the commit

commit 93456b6d7753def8760b423ac6b986eb9d5a4a95
Author: Denis V. Lunev <[e-mail]>
Date: Thu Jan 10 03:23:38 2008 -0800

[IPV4]: Unify access to the routing tables.

the defenition of FIB_HASH_TABLE size has obtained wrong dependency:
it should depend upon CONFIG_IP_MULTIPLE_TABLES (as was in the original
code) but it was depended from CONFIG_IP_ROUTE_MULTIPATH

This patch returns the situation to the original state.

The problem was spotted by Tingwei Liu.

Signed-off-by: Denis V. Lunev <[e-mail]>
CC: Tingwei Liu <[e-mail]>
CC: Alexey Kuznetsov <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

include/net/ip_fib.h

···
 };
 
 #ifdef CONFIG_IP_ROUTE_MULTIPATH
-
 #define FIB_RES_NH(res)		((res).fi->fib_nh[(res).nh_sel])
-
-#define FIB_TABLE_HASHSZ 2
-
 #else /* CONFIG_IP_ROUTE_MULTIPATH */
-
 #define FIB_RES_NH(res)		((res).fi->fib_nh[0])
-
-#define FIB_TABLE_HASHSZ 256
-
 #endif /* CONFIG_IP_ROUTE_MULTIPATH */
+
+#ifdef CONFIG_IP_MULTIPLE_TABLES
+#define FIB_TABLE_HASHSZ 256
+#else
+#define FIB_TABLE_HASHSZ 2
+#endif
 
 extern __be32 fib_info_update_nh_saddr(struct net *net, struct fib_nh *nh);