m68k: mcf5445x: move early ddr init as board-specific

For certain boot types and sbf, for V4 cpu's, an early ddr/sdram init
is required. This patch moves this ddr/sdram early initalization
away from start.S (to be board related).

Signed-off-by: Angelo Dureghello <angelo@sysam.it>
diff --git a/include/configs/M54418TWR.h b/include/configs/M54418TWR.h
index 6822b4c..66a17f2 100644
--- a/include/configs/M54418TWR.h
+++ b/include/configs/M54418TWR.h
@@ -24,6 +24,8 @@
 #define CONFIG_SYS_UART_PORT		(0)
 #define CONFIG_SYS_BAUDRATE_TABLE	{ 9600 , 19200 , 38400 , 57600, 115200 }
 
+#define LDS_BOARD_TEXT			board/freescale/m54418twr/sbf_dram_init.o (.text*)
+
 #undef CONFIG_WATCHDOG
 
 #define CONFIG_TIMESTAMP	/* Print image info with timestamp */