staging: rtl8192e: Rename ChannelPlan, eeprom_ChannelPlan and CckPwEnl

Rename variable ChannelPlan to chnl_plan, eeprom_ChannelPlan to
eeprom_chnl_plan and CckPwEnl to cck_pwr_enl 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/aee78a6adf41a2096898e0c0c5ef45e9f7e1659b.1673290428.git.philipp.g.hortmann@gmail.com


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