arm64: defconfig: Drop unneeded unselectable sound drivers

SND_SOC_ES8328 is selected by SND_SOC_ES8328_I2C. SND_SOC_WCD939X is
selected by SND_SOC_WCD939X.  None of these are user-visible options so
their presence in defconfig is redundant.

Link: https://lore.kernel.org/r/20250612134421.95782-4-krzysztof.kozlowski@linaro.org


Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>