FMCOMMS1: Implemented ad9122_get_fifo_status_regs() and XCOMM_GetDacFifoStatus() functions.

AD9122.c: Implemented the ad9122_get_fifo_status_regs() function.
xcomm.c: Implemented the XCOMM_GetDacFifoStatus() funcion.
FMCOMMS1: AD9122: Added a warning in case the retry count is exceeded.

cf_axi_dds.c: void cf_axi_dds_sync_frame() - Added a warning in case the
retry count is exceeded.