qcacld-3.0: Rename WMI_HOST_REGDMN_MODE to HOST_REGDMN_MODE
Rename WMI_HOST_REGDMN_MODE_11AC_VHT20_2G to
HOST_REGDMN_MODE_11AC_VHT20_2G to avoid duplicate
definitions and to be in line with the common repo.
Change-Id: I7ecd409641cd998b01165863758f56459282fa7b
CRs-Fixed: 3044438