iflib: Avoid double counting in rxeof

iflib_rxeof() was counting everything twice.  This was introduced when
pfil hooks were added to the iflib receive path.  We want to count rx
packets/bytes before the pfil hooks are executed, so remove the counter
adjustments that are executed after.

PR:		253583
Reviewed by:	gallatin, erj
MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D28900

sys/net/iflib.c

@@ -2973,8 +2973,6 @@ iflib_rxeof(iflib_rxq_t rxq, qidx_t budget)
 		if (!IP_ALIGNED(m) && (m = iflib_fixup_rx(m)) == NULL)
 			continue;
 #endif
-		rx_bytes += m->m_pkthdr.len;
-		rx_pkts++;
 #if defined(INET6) || defined(INET)
 		if (lro_enabled) {
 			if (!lro_possible) {