staging: r8188eu: remove TxCount from getTxPowerIndex88E()

In getTxPowerIndex88E() the variable TxCount is set to RF_PATH_A and
never changed. Remove the unnecessary extra variable and replace its
usage with RF_PATH_A.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20211128170924.5874-6-straube.linux@gmail.com


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