msm: kgsl: Identify all variations of indirect buffer opcodes

When searching for indirect buffers to dump in the snapshot, look for
all of the variations for the indirect buffer opcode, not just the
most commonly used one.  This picks up many IB2 buffers that were
previously left behind.

Change-Id: Ic0dedbad0fef91bf21a5de6d1928f350d2ad2009
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>