realtek_mst_i2c_spi.c: Trigger gpio 88 toggle down after write

BUG=b:152558985,b:148745673
BRANCH=none
TEST=builds

Change-Id: I1407714e1bb4cf2472090bae8a613c7103a5938c
Signed-off-by: Shiyu Sun <sshiyu@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/46448
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
1 file changed