tests: Set up mock chip memory in consistent and predictable way

This patch adds a macro MOCK_CHIP_CONTENT which represents a memory
state of a mock chip. The macro is used to initialise mock chip
memory at the beginning of a test (in setup_chip function).

Previously mock chip memory was not reset between tests. For
existing tests that did not matter, however new test for verify
operation (added later in this chain) needs mock chip memory to
be setup in a predictable way.

BUG=b:181803212
TEST=ninja test

Change-Id: I0d7623a601c207bfc62d54ab89d94cda56d85871
Signed-off-by: Anastasia Klimchuk <aklm@chromium.org>
---
M tests/chip.c
1 file changed, 2 insertions(+), 0 deletions(-)