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/tqc/tqm5200/tqm5200.c b/board/tqc/tqm5200/tqm5200.c
index 1e843d5..baf3208 100644
--- a/board/tqc/tqm5200/tqm5200.c
+++ b/board/tqc/tqm5200/tqm5200.c
@@ -133,7 +133,7 @@
  *	      is something else than 0x00000000.
  */
 
-phys_size_t initdram(void)
+int initdram(void)
 {
 	ulong dramsize = 0;
 	ulong dramsize2 = 0;
@@ -252,10 +252,12 @@
 	}
 
 #if defined(CONFIG_TQM5200_B)
-	return dramsize + dramsize2;
+	gd->ram_size = dramsize + dramsize2;
 #else
-	return dramsize;
+	gd->ram_size = dramsize;
 #endif /* CONFIG_TQM5200_B */
+
+	return 0;
 }
 
 int checkboard (void)