fix a typo preventing the second dma channel being released use isa_dma_release when releasing dma channels
fix a typo preventing the second dma channel being released
use isa_dma_release when releasing dma channels

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase