uadefs: cleanup cache_block_read(), remove MAGIC_LENGTH [PREVENTIVE]
uadefs: cleanup cache_block_read(), remove MAGIC_LENGTH [PREVENTIVE]

mldoering/uade-mld-git,mvtiaine/uade,mldoering/uade-mld-git,mvtiaine/uade,mldoering/uade-mld-git,mvtiaine/uade,mldoering/uade-mld-git,mvtiaine/uade