ASoC: Configure WM8731 SYSCLK at startup on AT91SAM9G20-EK

The system clock is currently fixed by the driver and this avoids
the need for us to handle errors with enabling and disabling MCLK
(which was incorrect previously so this fixes bugs in error
handling).

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
1 file changed