ish: remove sync fw clock print
ish: remove sync fw clock print

The kernel tries to sync the fw clock every 20 seconds and it adds noise
to the ISH console log since the ISH does not support fw clock sync.

BRANCH=none
BUG=none
TEST=console message no longer appears every 20 seconds.

Change-Id: I3650d81407c43b85d6c49f53f0633b945cc748cc
Signed-off-by: Jett Rink <9d4aef0593e6843318d99df31597fb6153b89787@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1557886
Commit-Ready: ChromeOS CL Exonerator Bot <fa429e5907f00867f797423aea74327bb02c91b6@appspot.gserviceaccount.com>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec