ASoC: msm: qdsp6v2: Add SEC_I2S_RX port as EC reference

SECONDARY_I2S_RX as EC reference port is needed for msm8x10.
Add support to enable SEC_I2S_RX as EC reference port.

CRs-Fixed: 646310

Change-Id: Ie114dd29afc16ff324388743377fb5c755f4ad7b
Signed-off-by: Venkata Narendra Kumar Gutta <vgutta@codeaurora.org>