drm/msm/sde: convert rm to use common sde_hw_blk base

Convert the sde resource manager to use the now common
sde_hw_blk container structure instead of a void pointer for
dealing with the hardware block types.

Change-Id: Iac333566691d59e9210fee4e0ae43dd23dcea44e
Signed-off-by: Lloyd Atkinson <latkinso@codeaurora.org>