Moved initialization of GRETH Ethernet driver to CPU directory

Added a cpu_eth_init() function to leon2/leon3 CPU directories and
removed code from net/eth.c

Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
diff --git a/cpu/leon2/cpu.c b/cpu/leon2/cpu.c
index 1c1e24b..5de1c52 100644
--- a/cpu/leon2/cpu.c
+++ b/cpu/leon2/cpu.c
@@ -56,3 +56,12 @@
 }
 
 /* ------------------------------------------------------------------------- */
+
+extern int greth_initialize(bd_t *bis);
+
+#ifdef CONFIG_GRETH
+int cpu_eth_init(bd_t *bis)
+{
+	return greth_initialize(bis);
+}
+#endif
diff --git a/cpu/leon3/cpu.c b/cpu/leon3/cpu.c
index 306a210..1725fdb 100644
--- a/cpu/leon3/cpu.c
+++ b/cpu/leon3/cpu.c
@@ -65,3 +65,11 @@
 }
 
 /* ------------------------------------------------------------------------- */
+extern int greth_initialize(bd_t *bis);
+
+#ifdef CONFIG_GRETH
+int cpu_eth_init(bd_t *bis)
+{
+	return greth_initialize(bis);
+}
+#endif
diff --git a/drivers/net/greth.c b/drivers/net/greth.c
index 76ece59..90c5338 100644
--- a/drivers/net/greth.c
+++ b/drivers/net/greth.c
@@ -657,5 +657,5 @@
 	/* set and remember MAC address */
 	greth_set_hwaddr(greth, addr);
 
-	return 1;
+	return 0;
 }
diff --git a/net/eth.c b/net/eth.c
index 50bea79..c40a19c 100644
--- a/net/eth.c
+++ b/net/eth.c
@@ -69,7 +69,6 @@
 extern int npe_initialize(bd_t *);
 extern int uec_initialize(int);
 extern int bfin_EMAC_initialize(bd_t *);
-extern int greth_initialize(bd_t *);
 extern int at91sam9_eth_initialize(bd_t *);
 
 #ifdef CONFIG_API
@@ -267,9 +266,6 @@
 #if defined(CONFIG_BF537)
 	bfin_EMAC_initialize(bis);
 #endif
-#if defined(CONFIG_GRETH)
-	greth_initialize(bis);
-#endif
 #if defined(CONFIG_AT91CAP9) || defined(CONFIG_AT91SAM9260) || \
     defined(CONFIG_AT91SAM9263)
 	at91sam9_eth_initialize(bis);