ASoC: codecs: rk817: fix missing I2C dependency in compile test

SND_SOC_RK817 uses I2C regmap so compile testing without parent MFD_RK808, requires I2C:

  WARNING: unmet direct dependencies detected for REGMAP_I2C
    Depends on [n]: I2C [=n]
    Selected by [y]:
    - SND_SOC_RK817 [=y] && SOUND [=y] && !UML && SND [=y] && SND_SOC [=y] && (MFD_RK808 [=n] || COMPILE_TEST [=y])

Reported-by: kernel test robot <lkp@intel.com>
Fixes: 5b7f4e5d

 ("ASoC: codecs: allow compile testing without MFD drivers")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220830075855.278046-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>