zephyr:test: led control tests expect to be power S5
zephyr:test: led control tests expect to be power S5

Flakey LED control test expects power level to be set
to a soft off state

BUG=none
BRANCH=none
TEST=zmake test test-drivers

Signed-off-by: Al Semjonovs <c3a2ecb550cad1e7d5a943ca6241377f7b43ffc4@google.com>
Change-Id: I9c5b9a606c8deb7d42b8f4362d705468e6976a1b
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3727185
Reviewed-by: Yuval Peress <50dc11c009bd4d7e9d9d15a383c1743ce5ee82ef@google.com>

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