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>

board/qemu-mips/qemu-mips.c

@@ -11,11 +11,15 @@
 #include <asm/io.h>
 #include <netdev.h>
 
-phys_size_t initdram(void)
+DECLARE_GLOBAL_DATA_PTR;
+
+int initdram(void)
 {
 	/* Sdram is setup by assembler code */
 	/* If memory could be changed, we should return the true value here */
-	return MEM_SIZE*1024*1024;
+	gd->ram_size = MEM_SIZE * 1024 * 1024;
+
+	return 0;
 }
 
 int checkboard(void)