staging: rtl8192e: Rename bLastDTPFlag_Low, OFDM_index and CCK_index

Rename variable bLastDTPFlag_Low to last_dtp_flag_low, OFDM_index to
ofdm_index and CCK_index to cck_index 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/1058b8be954b634f5c2cd9d4a46c33dbbe9459c5.1673812849.git.philipp.g.hortmann@gmail.com


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