umtrx: checkin original cal app for tx DC cal work
umtrx: some fixes to get cal app working again
umtrx: error message for streaming on uninitialized rx_dsp_core
umtrx: random convergence search for tx dc cal
umtrx: tweaks to umtrx_cal_tx_dc_offset + csv plotter
umtrx: multiple trials per LO to plot stddeviation
umtrx: change avg plot to be avg of trials @ same freq
umtrx: support for cal side A or B
Merge branch 'dc_cal_work' into umtrx_update