soc/apollolake/memmap: Switch to SIMPLE_DEVICE API

memmap.c functionality is designed to be used in more than ramstage.
Therefore, it cannot use ramstage-specific APIs. In this case, the
SIMPLE_DEVICE API offers a more consistent behavior across stages.

Change-Id: Ic381fe1eb773fb0a5fb5887eb67d2228d2f0817d
Signed-off-by: Alexandru Gagniuc <alexandrux.gagniuc@intel.com>
Reviewed-on: https://review.coreboot.org/14953
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
1 file changed