zephyr: tests: Increase drivers.default timeout to 120s
zephyr: tests: Increase drivers.default timeout to 120s

The test takes a bit longer than the default 60s time limit, at least on
my system. Increase this to 120s to prevent nuisance timeouts.

BRANCH=None
BUG=b:240602582
TEST=./twister

Signed-off-by: Tristan Honscheid <1e17951ff5ffc8afe254954c03de64afef62fe52@google.com>
Change-Id: Id84901535280b64d3ba500c9e4e80f0712734350
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3792506
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