sunxi: DRAM: fix H3 DRAM size display on aarch64

Fix the output of the DRAM size on AArch64 SPLs.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>
diff --git a/arch/arm/mach-sunxi/dram_sun8i_h3.c b/arch/arm/mach-sunxi/dram_sun8i_h3.c
index 1311eda..9f7cc7f 100644
--- a/arch/arm/mach-sunxi/dram_sun8i_h3.c
+++ b/arch/arm/mach-sunxi/dram_sun8i_h3.c
@@ -664,6 +664,6 @@
 	mctl_auto_detect_dram_size(&para);
 	mctl_set_cr(&para);
 
-	return (1 << (para.row_bits + 3)) * para.page_size *
+	return (1UL << (para.row_bits + 3)) * para.page_size *
 						(para.dual_rank ? 2 : 1);
 }