staging: rtl8192e: Rename dot11Cur..., bCurTxBW40MHz and bCurrentRT2...

Rename variable dot11CurrentPreambleMode to dot11_current_preamble_mode,
bCurTxBW40MHz to cur_tx_bw40mhz and bCurrentRT2RTLongSlotTime to
current_rt2rt_long_slot_time 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/97c4f62da9a98b0ddcdaafae68182e3eb47f9a17.1664055213.git.philipp.g.hortmann@gmail.com


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