Fix a race in ASR_ccbAdd and ASR_ccbRemove, which were both manipulating the ccb queue without masking interrupts.
Fix a race in ASR_ccbAdd and ASR_ccbRemove, which were both manipulating
the ccb queue without masking interrupts.

Submitted by:	Petr Lampa <lampa@fee.vutbr.cz>

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