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/freescale/m5249evb/m5249evb.c b/board/freescale/m5249evb/m5249evb.c
index b854429..d3c2acd 100644
--- a/board/freescale/m5249evb/m5249evb.c
+++ b/board/freescale/m5249evb/m5249evb.c
@@ -10,6 +10,8 @@
 #include <malloc.h>
 #include <asm/immap.h>
 
+DECLARE_GLOBAL_DATA_PTR;
+
 int checkboard (void) {
 	ulong val;
 	uchar val8;
@@ -29,7 +31,7 @@
 };
 
 
-phys_size_t initdram(void)
+int initdram(void)
 {
 	unsigned long	junk = 0xa5a59696;
 
@@ -82,7 +84,9 @@
 	mbar_writeLong(MCFSIM_DACR0, 0x0000b364);  /* Enable DACR0[IMRS] (bit 6); RE remains enabled */
 	*((volatile unsigned long *) 0x800) = junk; /* Access RAM to initialize the mode register */
 
-	return CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;
+	gd->ram_size = CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;
+
+	return 0;
 };