staging: rtl8192e: Rename btxpower_trackin.., Slide_Beaco.. and Slide_B..

Rename variable btxpower_trackingInit to tx_pwr_tracking_init,
Slide_Beacon_pwdb to slide_beacon_pwdb and Slide_Beacon_Total to
slide_beacon_total to avoid CamelCase which is not accepted by
checkpatch.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/b722cd913d04d07ac1952da2add2a16cfeb2dc8c.1674336211.git.philipp.g.hortmann@gmail.com


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