diag: Add support for diag id v2 feature

Diag id request control packet of version 2 from a peripheral
contains PD specific features supported. Support is added to
process the control packet and store the feature mask against
the diag_id assigned.

Change-Id: Ia9220f909551e4ac011cbf2a994d31535de431b5
Signed-off-by: Manoj Prabhu B <bmanoj@codeaurora.org>