staging: rtl8723bs: remove ODM_GetRightChnlPlaceforIQK()

staging: rtl8723bs: remove ODM_GetRightChnlPlaceforIQK()

Function ODM_GetRightChnlPlaceforIQK() returns non-zero values only
for channels > 14. According to the TODO code valid only for 5 GHz
should be removed.

- find and remove remaining code valid only for 5 GHz. Most of the
  obvious ones have been removed, but things like channel > 14 still
  exist.

Remove ODM_GetRightChnlPlaceforIQK() and replace the uses of the
return value with zero.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20200110210456.13178-1-straube.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>