Having CFLAGS with -Os disables -falign-function, for
unlucky builds this may delay entry to ramstage by 600ms.
Build the low-level IO functions aligned with -O2 instead.
Change-Id: Ice6781666a0834f1e8e60a0c93048ac8472f27d9
Original-Signed-off-by: Kysti Mlkki <kyosti.malkki@gmail.com>
Original-Reviewed-on: https://review.coreboot.org/14414
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
(cherry-picked from commit
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