ASoC: davinci: Clear VCIF read FIFO on errors

Clearing VCIF read FIFO on overflow and underflow events fixes audio glitching
when DMA load is high. This happened when simultaneously capturing and encoding
video and audio, for example.

Signed-off-by: Alexey Ignatov <lexszero@gmail.com>
davinci: DM365: Enable VCIF interrupt

This enables VCIF interrupt for DM365.

Signed-off-by: Alexey Ignatov <lexszero@gmail.com>