ARM: dts: msm: Fix liquid msm8994 mic bias

In the Liquid8994 the biases are connected to the codec 
externally. Therefore it requires external cap mode.
Fix AMIC3 bias: Connect it to bias3 and not to bias2
on liquid 8994.

Change-Id: I3011f3e9b0d972d426495b1374c5b7b7d0ba0c01
Acked-by: Hadar Sivan <hsivan@qti.qualcomm.com>
Signed-off-by: Ravit Dennis <rdennis@codeaurora.org>
Signed-off-by: Tanya Finkel <tfinkel@codeaurora.org>