ASoC: WCD9310: Tabla 2.0 Differential Speaker

Negative signal from RX3(connected to LO1) can go to Rx4(connected
to L03). Negative signal from RX5(connected to LO2) can go to
Rx6(connected to LO4). So for differential mode LO1/LO3 are considered
one channel and L02/LO4 are considered as another channel.

Change-Id: I9e4bb72c995effdd22bfc0a14e652782842d02db
Signed-off-by: Kiran Kandi <kkandi@codeaurora.org>