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/cm5200/cm5200.c b/board/cm5200/cm5200.c
index 2ac9fd9..be0d65c 100644
--- a/board/cm5200/cm5200.c
+++ b/board/cm5200/cm5200.c
@@ -97,7 +97,7 @@
 /*
  * Initalize SDRAM - configure SDRAM controller, detect memory size.
  */
-phys_size_t initdram(void)
+int initdram(void)
 {
 	ulong dramsize = 0;
 #ifndef CONFIG_SYS_RAMBOOT
@@ -150,7 +150,9 @@
 	*(vu_long *)MPC5XXX_SDRAM_SDELAY = 0x04;
 	__asm__ volatile ("sync");
 
-	return dramsize;
+	gd->ram_size = dramsize;
+
+	return 0;
 }