drm/msm/sde: remove catalog parsing limits

This patch removes the previous limit of MAX_BLOCKS from the
number of recognized key entries, and cleans up the catalog
parsing logic to remove a number of arrays from the call stack.

Change-Id: I926367296960daaf82978b0c4ce53f67dcb36ed2
Signed-off-by: Clarence Ip <cip@codeaurora.org>