arm: mvebu: Change network init code to allow a more flexible setup

With the introduction of the Armada 38x support, its necessary to change
the mvneta ethernet driver init call from always 4 times to a
configurable value. Lets make this init call more flexible by moving
the actually used devices to the config header.

Additionally this patch takes care of the slightly different base
addresses for the ethernet controllers on A38x.

Signed-off-by: Stefan Roese <sr@denx.de>
Tested-by: Kevin Smith <kevin.smith@elecsyscorp.com>
Tested-by: Dirk Eibach <dirk.eibach@gdsys.cc>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/include/configs/db-mv784mp-gp.h b/include/configs/db-mv784mp-gp.h
index 897f473..77d3408 100644
--- a/include/configs/db-mv784mp-gp.h
+++ b/include/configs/db-mv784mp-gp.h
@@ -53,7 +53,7 @@
 #define CONFIG_ENV_SECT_SIZE		(64 << 10) /* 64KiB sectors */
 
 #define CONFIG_PHY_MARVELL		/* there is a marvell phy */
-#define CONFIG_PHY_BASE_ADDR	0x10
+#define CONFIG_PHY_ADDR			{ 0x10, 0x11, 0x12, 0x13 }
 #define CONFIG_SYS_NETA_INTERFACE_TYPE	PHY_INTERFACE_MODE_QSGMII
 #define PHY_ANEG_TIMEOUT	8000	/* PHY needs a longer aneg time */
 #define CONFIG_RESET_PHY_R