ASoC: cs-amp-lib-test: Force test calibration blob entries to be valid

[ Upstream commit bff980d8d9ca537fd5f3c0e9a99876c1e3713e81 ]

For a normal calibration blob the calTarget values must be non-zero and
unique, and the calTime values must be non-zero. Don't rely on
get_random_bytes() to be random enough to guarantee this. Force the
calTarget and calTime values to be valid while retaining randomness
in the values.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Fixes: 17786231

 ("ASoC: cs-amp-lib: Add KUnit test for calibration helpers")
Link: https://patch.msgid.link/20240822115725.259568-1-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>