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/canmb/canmb.c b/board/canmb/canmb.c
index ba9930d..41194ec 100644
--- a/board/canmb/canmb.c
+++ b/board/canmb/canmb.c
@@ -18,6 +18,8 @@
 #include "mt48lc16m32s2-75.h"
 #endif
 
+DECLARE_GLOBAL_DATA_PTR;
+
 #ifndef CONFIG_SYS_RAMBOOT
 static void sdram_start (int hi_addr)
 {
@@ -65,7 +67,7 @@
  *            is something else than 0x00000000.
  */
 
-phys_size_t initdram(void)
+int initdram(void)
 {
 	ulong dramsize = 0;
 	ulong dramsize2 = 0;
@@ -163,7 +165,9 @@
 
 #endif /* CONFIG_SYS_RAMBOOT */
 
-	return dramsize + dramsize2;
+	gd->ram_size = dramsize + dramsize2;
+
+	return 0;
 }
 
 int checkboard (void)