ASoC: wcd9330: Add routing between ANC and ADCs

ADC5 and ADC6 can be connected to ANC MUX along with other
ADC inputs to use as error mic or noise mic. Add ADC5 and
ADC6 as inputs to ANC MUX for ANC(Active Noise Cancellation)
functionality on WCD9330 codec.

Change-Id: I2f297a24451ce0009d92f4a729fcb9edb4d2dc4d
Signed-off-by: Sudheer Papothi <spapothi@codeaurora.org>