ARM: dts: msm: Add support for msm8226 qrd board skuf

Initial qrd customer board SKUF device tree support.
The SKUF is distinguished using subtype id. Change the
device tree msm-id and board-id format to support this function.

Change-Id: Icafeefbc8d0e1b50027b465852ca530f5b815e6d
Signed-off-by: Maria Yu <aiquny@codeaurora.org>