[U-Boot] net: Move initialization of Au1x00 SoC ethernet MAC to cpu_eth_init

[Shinya Kuribayashi <skuribay@ruby.dti.ne.jp>]

This patch will move au1x00_eth_initialize from net/eth.c to cpu_eth_init
as a part of ongoing eth_initialize cleanup work.  The function ret value
is also fixed as it should be negative on fail.

Signed-off-by: Shinya Kuribayashi <skuribay@ruby.dti.ne.jp>
---
Hi Ben,

build tested. Please review.

  Shinya


 cpu/mips/au1x00_eth.c |    2 +-
 cpu/mips/cpu.c        |    7 +++++++
 include/netdev.h      |    1 +
 net/eth.c             |    4 ----
 4 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/cpu/mips/au1x00_eth.c b/cpu/mips/au1x00_eth.c
index 8ddc06a..6272a3a 100644
--- a/cpu/mips/au1x00_eth.c
+++ b/cpu/mips/au1x00_eth.c
@@ -283,7 +283,7 @@ int au1x00_enet_initialize(bd_t *bis){
 
 	if ((dev = (struct eth_device*)malloc(sizeof *dev)) == NULL) {
 		puts ("malloc failed\n");
-		return 0;
+		return -1;
 	}
 
 	memset(dev, 0, sizeof *dev);
diff --git a/cpu/mips/cpu.c b/cpu/mips/cpu.c
index 38d8697..c70cf0b 100644
--- a/cpu/mips/cpu.c
+++ b/cpu/mips/cpu.c
@@ -73,3 +73,10 @@ void write_one_tlb(int index, u32 pagemask, u32 hi, u32 low0, u32 low1)
 	write_c0_index(index);
 	tlb_write_indexed();
 }
+
+int cpu_eth_init(bd_t *bis)
+{
+#ifdef CONFIG_SOC_AU1X00
+	return au1x00_enet_initialize(bis);
+#endif
+}
diff --git a/include/netdev.h b/include/netdev.h
index 87d578c..b0d5c63 100644
--- a/include/netdev.h
+++ b/include/netdev.h
@@ -41,6 +41,7 @@ int board_eth_init(bd_t *bis);
 int cpu_eth_init(bd_t *bis);
 
 /* Driver initialization prototypes */
+int au1x00_enet_initialize(bd_t*);
 int bfin_EMAC_initialize(bd_t *bis);
 int dc21x4x_initialize(bd_t *bis);
 int e1000_initialize(bd_t *bis);
diff --git a/net/eth.c b/net/eth.c
index ccd871a..9f121c2 100644
--- a/net/eth.c
+++ b/net/eth.c
@@ -39,7 +39,6 @@ static int __def_eth_init(bd_t *bis)
 int cpu_eth_init(bd_t *bis) __attribute((weak, alias("__def_eth_init")));
 int board_eth_init(bd_t *bis) __attribute((weak, alias("__def_eth_init")));
 
-extern int au1x00_enet_initialize(bd_t*);
 extern int fec_initialize(bd_t*);
 extern int mpc8220_fec_initialize(bd_t*);
 extern int mv6436x_eth_initialize(bd_t *);
@@ -190,9 +189,6 @@ int eth_initialize(bd_t *bis)
 #if defined(FEC_ENET) || defined(CONFIG_ETHER_ON_FCC)
 	fec_initialize(bis);
 #endif
-#if defined(CONFIG_AU1X00)
-	au1x00_enet_initialize(bis);
-#endif
 #if defined(CONFIG_IXP4XX_NPE)
 	npe_initialize(bis);
 #endif