zephyr: Increase test timeout.
zephyr: Increase test timeout.

I had a cl fail in presubmit with a test timeout

Increase test timeout for this test.

BRANCH=None
BUG=None
TEST=None

Signed-off-by: Jeremy Bettis <4df7b5147fee087dca33c181f288ee7dbf56e022@google.com>
Change-Id: I6e041e8987081f4382ced4acfe93f1c70d1d4a4f
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3995331
Auto-Submit: Jeremy Bettis <4df7b5147fee087dca33c181f288ee7dbf56e022@chromium.org>
Reviewed-by: Tristan Honscheid <1e17951ff5ffc8afe254954c03de64afef62fe52@google.com>
Commit-Queue: Tristan Honscheid <1e17951ff5ffc8afe254954c03de64afef62fe52@google.com>
Commit-Queue: Jeremy Bettis <4df7b5147fee087dca33c181f288ee7dbf56e022@chromium.org>
Tested-by: Jeremy Bettis <4df7b5147fee087dca33c181f288ee7dbf56e022@chromium.org>

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