net: add a define for the number of packets received as batch

With a define for the magic number of packets received as batch
we can make sure that the EFI network stack caches the same amount
of packets.

Signed-off-by: Patrick Wildt <patrick@blueri.se>
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/include/net.h b/include/net.h
index 778acf7..aff6674 100644
--- a/include/net.h
+++ b/include/net.h
@@ -44,6 +44,9 @@
 
 #define PKTALIGN	ARCH_DMA_MINALIGN
 
+/* Number of packets processed together */
+#define ETH_PACKETS_BATCH_RECV	32
+
 /* ARP hardware address length */
 #define ARP_HLEN 6
 /*
diff --git a/net/eth-uclass.c b/net/eth-uclass.c
index 4424d59..e14695c 100644
--- a/net/eth-uclass.c
+++ b/net/eth-uclass.c
@@ -383,7 +383,7 @@
 
 	/* Process up to 32 packets at one time */
 	flags = ETH_RECV_CHECK_DEVICE;
-	for (i = 0; i < 32; i++) {
+	for (i = 0; i < ETH_PACKETS_BATCH_RECV; i++) {
 		ret = eth_get_ops(current)->recv(current, flags, &packet);
 		flags = 0;
 		if (ret > 0)