board_f: Drop return value from initdram()

At present we cannot use this function as an init sequence call without a
wrapper, since it returns the RAM size. Adjust it to set the RAM size in
global_data instead, and return 0 on success.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/board/micronas/vct/vct.c b/board/micronas/vct/vct.c
index f4a6521..02824ea 100644
--- a/board/micronas/vct/vct.c
+++ b/board/micronas/vct/vct.c
@@ -28,6 +28,8 @@
 #define BOARD_NAME_ADD	" NOR"
 #endif
 
+DECLARE_GLOBAL_DATA_PTR;
+
 int board_early_init_f(void)
 {
 	/*
@@ -59,10 +61,12 @@
  * SDRAM is already configured by the bootstrap code, only return the
  * auto-detected size here
  */
-phys_size_t initdram(void)
+int initdram(void)
 {
-	return get_ram_size((long *)CONFIG_SYS_SDRAM_BASE,
+	gd->ram_size = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE,
 			    CONFIG_SYS_MBYTES_SDRAM << 20);
+
+	return 0;
 }
 
 int checkboard(void)