Merge pull request #1 in PROCESSOR-SDK/audio-preprocessing-fw from k2g_cmb_rt to...

* commit 'b45d2540932f94585fccdbc7f4c9dceba000885e': (24 commits)
  realtime_demo_bios: remove the reference to the mcasp_osal.c
  realtime_demo_bios: remove the reference to hwiNumber
  audio-preprocessing-fw: add UART_printf, change the CCS project file using relative paths, add SBL support
  audio-preprocessing-fw: add README.txt file
  realtime_demo_bios: fix the CMB PCM1864 PLL setting issue
  file_demo_bios: move the CCS project file into ccs folder realtime_demo_bios: move the CCS project file into ccs folder
  realtime_demo_bios: change sampleing frequency from 48Khz to 16 Khz. move the CCS project files
  file_demo_bios/am57xx: use the common folder for all the shared files; change to 7 input files and replace VAD with DRC
  realtime_demo_bios: fix the PCM1864 DOUT2 does not working issue
  realtime_demo_bios: update CCS project file
  realtime_demo_bios: update the demo using cmb to replace the cmbk2g
  file_demo_bios: update makefile
  file_demo_bios: use DRC processing to replace the VAD
  realtime_demo_bios: change project name to K2G_bf_rt, add DRC processing code
  realtime_demo_bios: fix the "gmake|make clean" error
  realtime_demo_bios: add the DRC support
  realtime_demo_bios: add 16Khz option
  realtime_demo_bios: bug fix
  realtime_demo_bios: update the makefile
  audio-preprocessing-fw: change real time demo to use the cmbk2g library
  ...