There were missing break statements so everything used
TWO_CHANNEL_SUPPORT.

Also I added a return statement to silence a GCC warning:

	sound/soc/dwc/designware_i2s.c: In function ‘dw_i2s_hw_params’:
	sound/soc/dwc/designware_i2s.c:236:32: warning: ‘ch_reg’ may be
		used uninitialized in this function
		[-Wmaybe-uninitialized]
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Acked-by: NRajeev Kumar <rajeev-dlh.kumar@st.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Otherwise sparse gets very upset with us.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

This patch add support for synopsys I2S controller as per the ASoC
framework.
Signed-off-by: NRajeev Kumar <rajeev-dlh.kumar@st.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>