MX51EVK: UART does not print out the early information

The early bootup information is not print out due to
the UART pin iomux not set up correctly before board_init

Add the board_early_init_f function and enable the
CONFIG_BOARD_EARLY_INIT_F. Move the UART pin setting
from board_init to board_early_init_f function.

This patch also move the FEC pin iomux setup to the
board_early_init_f.
Signed-off-by: NJason Liu <r64343@freescale.com>

board/freescale/mx51evk/mx51evk.c

@@ -399,6 +399,14 @@ int board_mmc_init(bd_t *bis)
 }
 #endif
 
+int board_early_init_f(void)
+{
+	setup_iomux_uart();
+	setup_iomux_fec();
+
+	return 0;
+}
+
 int board_init(void)
 {
 	system_rev = get_cpu_rev();
@@ -407,9 +415,6 @@ int board_init(void)
 	/* address of boot parameters */
 	gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
 
-	setup_iomux_uart();
-	setup_iomux_fec();
-
 	return 0;
 }
 

include/configs/mx51evk.h

@@ -203,6 +203,8 @@
 #define CONFIG_SYS_INIT_RAM_ADDR	(IRAM_BASE_ADDR)
 #define CONFIG_SYS_INIT_RAM_SIZE	(IRAM_SIZE)
 
+#define CONFIG_BOARD_EARLY_INIT_F
+
 #define CONFIG_SYS_INIT_SP_OFFSET \
 	(CONFIG_SYS_INIT_RAM_SIZE - GENERATED_GBL_DATA_SIZE)
 #define CONFIG_SYS_INIT_SP_ADDR \