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/varisys/cyrus/ddr.c b/board/varisys/cyrus/ddr.c
index da6f5ad..abf4e93 100644
--- a/board/varisys/cyrus/ddr.c
+++ b/board/varisys/cyrus/ddr.c
@@ -168,7 +168,7 @@
 	popts->ddr_cdr1 = DDR_CDR1_DHC_EN;
 }
 
-phys_size_t initdram(void)
+int initdram(void)
 {
 	phys_size_t dram_size;
 
@@ -184,5 +184,7 @@
 	dram_size *= 0x100000;
 
 	debug("    DDR: ");
-	return dram_size;
+	gd->ram_size = dram_size;
+
+	return 0;
 }