net: rename CONFIG_NET_LL_RX_POLL to CONFIG_NET_RX_BUSY_POLL

Eliezer renames several *ll_poll to *busy_poll, but forgets
CONFIG_NET_LL_RX_POLL, so in case of confusion, rename it too.

Cc: Eliezer Tamir <eliezer.tamir@linux.intel.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/sock.c b/net/core/sock.c
index 548d716..2c097c5 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -900,7 +900,7 @@
 		sock_valbool_flag(sk, SOCK_SELECT_ERR_QUEUE, valbool);
 		break;
 
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
 	case SO_BUSY_POLL:
 		/* allow unprivileged users to decrease the value */
 		if ((val > sk->sk_ll_usec) && !capable(CAP_NET_ADMIN))
@@ -1170,7 +1170,7 @@
 		v.val = sock_flag(sk, SOCK_SELECT_ERR_QUEUE);
 		break;
 
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
 	case SO_BUSY_POLL:
 		v.val = sk->sk_ll_usec;
 		break;
@@ -2292,7 +2292,7 @@
 
 	sk->sk_stamp = ktime_set(-1L, 0);
 
-#ifdef CONFIG_NET_LL_RX_POLL
+#ifdef CONFIG_NET_RX_BUSY_POLL
 	sk->sk_napi_id		=	0;
 	sk->sk_ll_usec		=	sysctl_net_busy_read;
 #endif