Remove "IshEnable" from soc_intel_skylake_config since it's not
used anymore.
Enable/disable ISH by checking if ISH device is turned on or not.
Refer to https://review.coreboot.org/#/c/coreboot/+/26485/.
BUG=b:79244403
BRANCH=none
TEST=Built.
Change-Id: I4d2889af118659852431c87cb516fd19b577efc5
Signed-off-by: li feng <li1.feng@intel.com>
Reviewed-on: https://review.coreboot.org/26521
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
3130a93bfa