awgtpman: changed to ignore type of first adc. Get IOP rate from IOMem mbuf.

awgtpman: awg excitation buffers increased to support rates > 1 Msps. Max is 2^20 sps.

changed to ignore type of first adc. Will work on other than 16 bit adc. Now gets sample rate from IOP via mbuf. Uses sample rate to meter the gds heartbeat instead of fixed 65536 rate. awg data buffers now can handle 2^20 samples per second. IO mem data moved partially to new shared memory definition style, but still needs an offset.

Build error in "warnings" branch fixed.

Model rate now used instead of rate multiplier for seeing how much headroom is available for a new test point.