linux-phytec-ti

ASoC: tlv320aic31xx: Correct interface register 2 variable name

Rename iface_reg3 to iface_reg2 since this variable is actually used for
interface register 2.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>