msm: smd_debug: add support for non-default partitions

Each secured SMEM partition can have its own set of SMD allocation tables
with SMD channels that will not appear in the default SMD allocation
tables.

Add support to parse and output information about channels in the secured
SMEM partitions to assist debugging.

Change-Id: I08f1f88fe12d60b13e4680451e7882e388633d02
Signed-off-by: Jeffrey Hugo <jhugo@codeaurora.org>