staging: r8188eu: remove ODM_GetRightChnlPlaceforIQK()

staging: r8188eu: remove ODM_GetRightChnlPlaceforIQK()

Function ODM_GetRightChnlPlaceforIQK() returns always zero for
channels <= 14. The driver is for chips that do not support 5 GHz,
so remove the function and replace the usage of its return value
with zero.

Acked-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Acked-by: Phillip Potter <phil@philpotter.co.uk>
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20210814073920.3551-1-straube.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>