ring: fix dequeue parameter name

[ upstream commit b632e76751ff9797e36531305638e1cbd14ffa09 ]

Ring dequeue operation's parameters name should be 'cons_xx',
rather than 'prod_xxx'.

Fixes: 1fc7339 ("ring: refactor exported headers")

Signed-off-by: Feifei Wang <feifei.wang2@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
Acked-by: Morten Brørup <mb@smartsharesystems.com>

lib/ring/rte_ring_elem_pvt.h

@@ -194,12 +194,12 @@ __rte_ring_dequeue_elems_32(struct rte_ring *r, const uint32_t size,
 }
 
 static __rte_always_inline void
-__rte_ring_dequeue_elems_64(struct rte_ring *r, uint32_t prod_head,
+__rte_ring_dequeue_elems_64(struct rte_ring *r, uint32_t cons_head,
 		void *obj_table, uint32_t n)
 {
 	unsigned int i;
 	const uint32_t size = r->size;
-	uint32_t idx = prod_head & r->mask;
+	uint32_t idx = cons_head & r->mask;
 	uint64_t *ring = (uint64_t *)&r[1];
 	unaligned_uint64_t *obj = (unaligned_uint64_t *)obj_table;
 	if (likely(idx + n < size)) {
@@ -227,12 +227,12 @@ __rte_ring_dequeue_elems_64(struct rte_ring *r, uint32_t prod_head,
 }
 
 static __rte_always_inline void
-__rte_ring_dequeue_elems_128(struct rte_ring *r, uint32_t prod_head,
+__rte_ring_dequeue_elems_128(struct rte_ring *r, uint32_t cons_head,
 		void *obj_table, uint32_t n)
 {
 	unsigned int i;
 	const uint32_t size = r->size;
-	uint32_t idx = prod_head & r->mask;
+	uint32_t idx = cons_head & r->mask;
 	rte_int128_t *ring = (rte_int128_t *)&r[1];
 	rte_int128_t *obj = (rte_int128_t *)obj_table;
 	if (likely(idx + n < size)) {