Kirkwood: bugfix: broken early console messages

It has been observed that, the complete u-boot banner
does not appear on the console when the system is booted
from NAND/NOR/SPI flash.

This patch fixes this issue on all Marvell boards by adding
board_early_init_f() support

Signed-off-by: Prafulla Wadaskar <prafulla@marvell.com>
diff --git a/board/Marvell/guruplug/guruplug.c b/board/Marvell/guruplug/guruplug.c
index 4df4e9b..1f0e67a 100644
--- a/board/Marvell/guruplug/guruplug.c
+++ b/board/Marvell/guruplug/guruplug.c
@@ -30,7 +30,7 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-int board_init(void)
+int board_early_init_f(void)
 {
 	/*
 	 * default gpio configuration
@@ -96,7 +96,11 @@
 		0
 	};
 	kirkwood_mpp_conf(kwmpp_config);
+	return 0;
+}
 
+int board_init(void)
+{
 	/*
 	 * arch number of board
 	 */