ASoC fix up SND_SOC_WM8985 dependency

I just added an I2C dependency to the wm8985 driver to work around
a build failure, but it turns out that was premature: we actually
need to depend on SND_SOC_I2C_AND_SPI, as the driver can work with either
of the two, and we only need to prevent a configuration that has
I2C=m and SND_SOC_WM8985=y.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 05252513

 ("ASoC: wm8985: add i2c dependency")
Signed-off-by: Mark Brown <broonie@kernel.org>