soc: samsung: Fix typo in CONFIG_EXYNOS_USI description

The proper name is Exynos Auto V9, not V0. It was the typo slipped in
unnoticed, fix it.

Fixes: b603377e

 ("soc: samsung: Add USI driver")
Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Reviewed-by: Chanho Park <chanho61.park@samsung.com>
Link: https://lore.kernel.org/r/20220114144606.24358-1-semen.protsenko@linaro.org


Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>