On Waipio target, periph top0 block has been removed from mdp top
register block. This creates a hole in the accessible register space
and can lead to NOC errors. In addition, accessing register offset
for invalid dedicated concurrent write back can lead to NOC errors.
This change adds support for indicating if the periph block has been
removed and splitting the mdp top register block into two for reg dump.
In addition, it only registers valid dcwb to be reg dumped by
adding a dcwb count.
Change-Id: I23931cdf5ce4d858a3837f3946b54d9231e0db27
Signed-off-by: Nilaan Gunabalachandran <ngunabal@codeaurora.org>