This adds eMMC preset settings. It also fixes some formatting and a comment. BUG=b:159823235 TEST=Build test Cq-Depend: chrome-internal:3251807 Signed-off-by: Raul E Rangel <rrangel@chromium.org> Change-Id: Ic5caff594157e03d792b999ca60274cf53c708e2 Reviewed-on: https://review.coreboot.org/c/coreboot/+/45096 Reviewed-by: Felix Held <felix-coreboot@felixheld.de> Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>