msm: kgsl: Parse set draw state packet found in IB for A4XX

Add parsing of set draw state packet when searching for memory
objects in IB. This is a new PM4 packet type introduced for
A4XX. The packet declares a list of command streams that can
contain pointers to other objects like vbos, textures, etc.
When parsing a set draw state packet all the objects in the
command stream needs to be tracked including the command stream
itself.

Change-Id: I74dccf7bfab7a1313833a3d4551fd22d686172a0
Signed-off-by: Shubhraprakash Das <sadas@codeaurora.org>