E1000: clean up CONFIG_E1000_FALLBACK_MAC handling

Avoid "integer constant is too large for 'long' type" warnings.
And simplify the code.

Signed-off-by: Wolfgang Denk <wd@denx.de>

drivers/net/e1000.c

@@ -513,9 +513,11 @@ e1000_read_mac_addr(struct eth_device *nic)
 		nic->enetaddr[5] += 1;
 	}
 #ifdef CONFIG_E1000_FALLBACK_MAC
-	if ( *(u32*)(nic->enetaddr) == 0 || *(u32*)(nic->enetaddr) == ~0 )
-		for ( i=0; i < NODE_ADDRESS_SIZE; i++ )
-			nic->enetaddr[i] = (CONFIG_E1000_FALLBACK_MAC >> (8*(5-i))) & 0xff;
+	if ( *(u32*)(nic->enetaddr) == 0 || *(u32*)(nic->enetaddr) == ~0 ) {
+		unsigned char fb_mac[NODE_ADDRESS_SIZE] = CONFIG_E1000_FALLBACK_MAC;
+
+		memcpy (nic->enetaddr, fb_mac, NODE_ADDRESS_SIZE);
+	}
 #endif
 #else
 	/*
@@ -531,10 +533,9 @@ e1000_read_mac_addr(struct eth_device *nic)
 	DEBUGFUNC();
 
 	s = getenv ("ethaddr");
-	if (s == NULL){
+	if (s == NULL) {
 		return -E1000_ERR_EEPROM;
-	}
-	else{
+	} else {
 		for(ii = 0; ii < 6; ii++) {
 			nic->enetaddr[ii] = s ? simple_strtoul (s, &e, 16) : 0;
 			if (s){

include/configs/MVBC_P.h

@@ -255,7 +255,7 @@
 #define CONFIG_NET_RETRY_COUNT 5
 
 #define CONFIG_E1000
-#define CONFIG_E1000_FALLBACK_MAC	0xb6b445ebfbc0
+#define CONFIG_E1000_FALLBACK_MAC	{ 0xb6, 0xb4, 0x45, 0xeb, 0xfb, 0xc0 }
 #undef CONFIG_MPC5xxx_FEC
 #undef CONFIG_PHY_ADDR
 #define CONFIG_NETDEV		eth0