soc/amd/stoneyridge/southbridge.c: Create a GPIO programming function

Create a GPIO programming function that can be called from multiple
stages (bootblock, romstage and ramstage) that will program only the
GPIO specific to the particular stage.

Add dummy table to kahlee, grunt and gardenia to be able to test a build.

BUG=b:64140392
TEST=Build kahlee, grunt and gardenia with GPIO programming call at
bootblock. This call is removed before commit, so bootblock.c is not
committed.

Change-Id: I88d65c78a186bed9739bc208d5711a31aa3c3bb6
Signed-off-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Reviewed-on: https://review.coreboot.org/22986
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
8 files changed