configs: sandbox64: Enable SF bootdev

Align the sandbox64 defconfig with sandbox defconfig. Enable missing
SPI NOT bootdev. This fixes ut_bootstd_bootdev_test_cmd_hunt test .

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
1 file changed