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Previously the keyboard row and column pins could not use the GPIO alternate function mechanism because their DEVALT bits were inverted with respect to all of the others, making it impossible to correctly configure them. With the refactor of the GPIO driver we can now add the keyboard DEVALT entries to the gpio_alt_table, and use the ALTERNATE macro and associated APIs to control the keyboard pin states. The Wheatley RO firmware image is still 320 bytes smaller than before the GPIO refactor. Signed-off-by: Anton Staaf <robotboy@chromium.org> BRANCH=None BUG=None TEST=make buildall -j Ran on Wheatley, manually verified keyboard functionality Change-Id: Id04bc010834b5d95050b03ace6b0e1c5690757bf Reviewed-on: https://chromium-review.googlesource.com/329762 Commit-Ready: Anton Staaf <robotboy@chromium.org> Tested-by: Anton Staaf <robotboy@chromium.org> Reviewed-by: Mulin Chao <mlchao@nuvoton.com> Reviewed-by: Shawn N <shawnn@chromium.org>