ARM: dts: msm8974: Add support for incall LCH tone playback

Update the device tree to add AFE port id needed to enable
incall music delivery on the second subscription.

CRs-Fixed: 626562
Change-Id: Idf6ae3cd9c916c250ea587837031c80f4522a11f
Signed-off-by: Avinash Vaish <avaish@codeaurora.org>
Signed-off-by: Karthik Reddy Katta <a_katta@codeaurora.org>