qcom-common: use caf display variant on msm8660

Change-Id: I0feefb849ddf0dbae8599b9324b8b79a39cf18c3
qcom-common: Set property after modem links are created

 * Needed for scripts to trigger on.

Change-Id: I930a981151f1001def5acae689d2c26b7d8a7d6d