cleanup system property ro.product.device usage

Replace 'ro.product.device' usage with 'ro.board.platform'
to enable qcom chipset specific features.

Using ro.product.device for enabling chipset specific
features requires manual changes for the customers who
want build their own device.

Change-Id: If05e9062ef457088bdea2c6aa7b68540a7d2ceea
CRs-Fixed: 311796