staging: rtl8192e: Rename tmpCCK20Mindex and tmpCCK40Mindex

Rename variable tmpCCK20Mindex to tmp_cck_20m_index and
tmpCCK40Mindex to tmp_cck_40m_index to avoid CamelCase which
is not accepted by checkpatch.

Signed-off-by: Yogesh Hegde <yogi.kernel@gmail.com>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/3e8b6cd85e6e4fcc934cc1d813f5f594cef8ff92.1683730854.git.yogi.kernel@gmail.com


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