Samus: Increase the time of servo_prog_state_delay

Sometime the current 5 seconds servo_prog_state_delay are not enough.
It causes flashrom failed due to ME's interference. Double its value
for safe.

BUG=chromium:534882
TEST=Running the following Python script on Samus.
  import common
  from autotest_lib.server.hosts import servo_host
  sh = servo_host.create_servo_host(SAMUS_DUT_IP, {})
  sh._servo.program_bios(FIRMWARE_PATH)

Change-Id: Id65b14287c55677e11ee4701548ae8dcd25366f3
Reviewed-on: https://chromium-review.googlesource.com/310876
Commit-Ready: Wai-Hong Tam <waihong@chromium.org>
Tested-by: Wai-Hong Tam <waihong@chromium.org>
Reviewed-by: Shelley Chen <shchen@chromium.org>
1 file changed