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/tqm834x/tqm834x.c b/board/tqc/tqm834x/tqm834x.c
index a05ae2a..0968e49 100644
--- a/board/tqc/tqm834x/tqm834x.c
+++ b/board/tqc/tqm834x/tqm834x.c
@@ -66,7 +66,7 @@
 /**************************************************************************
  * DRAM initalization and size detection
  */
-phys_size_t initdram(void)
+int initdram(void)
 {
 	long bank_size;
 	long size;
@@ -112,7 +112,9 @@
 		if(size < DDR_MAX_SIZE_PER_CS) break;
 	}
 
-	return size;
+	gd->ram_size = size;
+
+	return 0;
 }
 
 /**************************************************************************