SystemSW: CAS pointer handling in mp

The pointers are now handled with pop and push operations.
SystemSW: Adapt mutex type in list
SystemSW: mp transfers with byte granularity
SystemSW: Trace message passing functions
SystemSW: Actually fill receive buffer in mp
Source code beautification
SystemSW: New buffer overflow error in mp
SystemSW: Rework implementation of send and recv
SystemSW: mp select control and data plane