net: cosmetic: Clean up ARP variables and functions

Make a thorough pass through all variables and function names contained
within arp and remove CamelCase and improve naming.

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/net/net.c b/net/net.c
index b8acbb4..9a4290b 100644
--- a/net/net.c
+++ b/net/net.c
@@ -302,7 +302,7 @@
 			net_rx_packets[i] = net_tx_packet +
 				(i + 1) * PKTSIZE_ALIGN;
 		}
-		ArpInit();
+		arp_init();
 		net_clear_handlers();
 
 		/* Only need to setup buffer pointers once. */
@@ -495,7 +495,7 @@
 			goto done;
 		}
 
-		ArpTimeoutCheck();
+		arp_timeout_check();
 
 		/*
 		 *	Check for a timeout, and run the timeout handler
@@ -733,15 +733,15 @@
 
 		/* save the ip and eth addr for the packet to send after arp */
 		net_arp_wait_packet_ip = dest;
-		NetArpWaitPacketMAC = ether;
+		arp_wait_packet_ethaddr = ether;
 
 		/* size of the waiting packet */
-		NetArpWaitTxPacketSize = pkt_hdr_size + payload_len;
+		arp_wait_tx_packet_size = pkt_hdr_size + payload_len;
 
 		/* and do the ARP request */
-		NetArpWaitTry = 1;
-		NetArpWaitTimerStart = get_timer(0);
-		ArpRequest();
+		arp_wait_try = 1;
+		arp_wait_timer_start = get_timer(0);
+		arp_request();
 		return 1;	/* waiting */
 	} else {
 		debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n",
@@ -1059,7 +1059,7 @@
 	switch (eth_proto) {
 
 	case PROT_ARP:
-		ArpReceive(et, ip, len);
+		arp_receive(et, ip, len);
 		break;
 
 #ifdef CONFIG_CMD_RARP