zephyr: isl923x: Test hibernation (reg write errors)
zephyr: isl923x: Test hibernation (reg write errors)

 * Test raa489000_hibernate() but fail at each of the register writes.

BRANCH=None
BUG=b:184856906
TEST=zmake -D configure --test test-drivers

Signed-off-by: Tristan Honscheid <1e17951ff5ffc8afe254954c03de64afef62fe52@google.com>
Change-Id: Ie88a7556cb17b0cd53f6b16ea49a62d697cdb823
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3335877
Reviewed-by: Wai-Hong Tam <04b587fdf5845741a0c5a8b9cd59ca72d73ef8fc@google.com>

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