[U-Boot] [PATCH 03/21] sandbox: physmem: Use mapping to support sandbox

[sjg at google.com]

Replace the raw cast with a map_sysmem() call so this code works with
sandbox.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 lib/physmem.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Applied to u-boot-dm/master, thanks!