omap5912-osk: Fix DRAM initialisation

The size of the DRAM for the omap5912-osk board is getting setup in the
dram_init() function. However, for the current u-boot release this is
too late and needs to be done in dram_init_banksize(). Therefore, add
a dram_init_banksize() function for the omap5912-osk board and setup the
DRAM size there.

Signed-off-by: Jon Hunter <jon-hunter@ti.com>

board/ti/omap5912osk/omap5912osk.c

@@ -128,14 +128,19 @@ void ether__init (void)
  Routine:
  Description:
 ******************************/
-int dram_init (void)
+int dram_init(void)
 {
-	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
-	gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
+	gd->ram_size = get_ram_size((long *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE);
 
 	return 0;
 }
 
+void dram_init_banksize(void)
+{
+	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
+	gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
+}
+
 /******************************************************
  Routine: set_muxconf_regs
  Description: Setting up the configuration Mux registers