socinfo: msm8226: add support for QRD subtype table in legacy socinfo file

Add QRD subtype table to indicate different customer
hardware in legacy socinfo file. The change will take
effect in /sys/devices/soc#/platform_subtype.

Change-Id: Ifdb919847afed14a078b0ba1dab0ca24358cc71c
Signed-off-by: Maria Yu <aiquny@codeaurora.org>