staging: r8188eu: remove local variable Indexforchannel

The local variable Indexforchannel in function
odm_TXPowerTrackingCallback_ThermalMeter_8188E() is initilaized to 0
and never changed. Remove the variable and replace its usage with 0.

Acked-by: Phillip Potter <phil@philpotter.co.uk>
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20210829175624.5915-1-straube.linux@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>