arm: freescale: Rename initdram() to fsl_initdram()

This function name shadows a global name but is in fact different. This
is very confusing. Rename it to help with the following refactoring.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/freescale/ls1043aqds/ls1043aqds.c b/board/freescale/ls1043aqds/ls1043aqds.c
index 538bba5..2df63e4 100644
--- a/board/freescale/ls1043aqds/ls1043aqds.c
+++ b/board/freescale/ls1043aqds/ls1043aqds.c
@@ -7,6 +7,7 @@
 #include <common.h>
 #include <i2c.h>
 #include <fdt_support.h>
+#include <fsl_ddr_sdram.h>
 #include <asm/io.h>
 #include <asm/arch/clock.h>
 #include <asm/arch/fsl_serdes.h>
@@ -153,7 +154,7 @@
 	 * before accessing DDR SPD.
 	 */
 	select_i2c_ch_pca9547(I2C_MUX_CH_DEFAULT);
-	initdram();
+	fsl_initdram();
 #if !defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD)
 	/* This will break-before-make MMU for DDR */
 	update_early_mmu_table();