spi-mux: do not set if chassis power is on

The op-reset-chassis-running@.service determines if chassis power is on,
and if so creates the /run/openbmc/chassis@0-on file. Need to let this
service run and create the file if chassis power is on.

Tested:
- Verified that when BMC is rebooted with chassis power on that when
  the BMC comes back up, it does not run the set-spi-mux.service.

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: I6075008dc8d7be9d111bbbc9b48606d8bb806e63
1 file changed