Revert "compat:inet_frag.h: Check for frag_percpu_counter_batch"

This reverts commit 822afef.

Requested-at: https://mail.openvswitch.org/pipermail/ovs-dev/2018-January/343674.html
Requested-by: Gregory Rose <gvrose8192@gmail.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>

datapath/linux/compat/include/net/inet_frag.h

@@ -30,7 +30,6 @@ static inline bool inet_frag_evicting(struct inet_frag_queue *q)
 #endif
 
 #ifndef HAVE_SUB_FRAG_MEM_LIMIT_ARG_STRUCT_NETNS_FRAGS
-#ifdef frag_percpu_counter_batch
 static inline void rpl_sub_frag_mem_limit(struct netns_frags *nf, int i)
 {
 	__percpu_counter_add(&nf->mem, -i, frag_percpu_counter_batch);
@@ -42,19 +41,6 @@ static inline void rpl_add_frag_mem_limit(struct netns_frags *nf, int i)
 	__percpu_counter_add(&nf->mem, i, frag_percpu_counter_batch);
 }
 #define add_frag_mem_limit rpl_add_frag_mem_limit
-#else /* !frag_percpu_counter_batch */
-static inline void rpl_sub_frag_mem_limit(struct netns_frags *nf, int i)
-{
-	atomic_sub(i, &nf->mem);
-}
-#define sub_frag_mem_limit rpl_sub_frag_mem_limit
-
-static inline void rpl_add_frag_mem_limit(struct netns_frags *nf, int i)
-{
-	atomic_add(i, &nf->mem);
-}
-#define add_frag_mem_limit rpl_add_frag_mem_limit
-#endif /* frag_percpu_counter_batch */
 #endif
 
 #ifdef HAVE_VOID_INET_FRAGS_INIT