meta-zaius: Don't run refclock fixup if host is up

The clock generator output fixup workaround temporarily disables the
clock output when run, crashing the host if it's up.

Fixes openbmc/openbmc#1274.

Signed-off-by: Xo Wang <xow@google.com>
Change-Id: Ib734ffc43eb29c7b7039419c8fdd42e4d47c3260
1 file changed