staging: rtl8192e: Rename Tx... and RxCheckStuckHandler

Variable name TxCheckStuckHandler and RxCheckStuckHandler is changed to
avoid CamelCase which is not accepted by checkpatch.pl

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/3041cec77df10cdff18d5466beb3b0616370b112.1661370978.git.philipp.g.hortmann@gmail.com


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