staging: r8188eu: rename fields of struct rtl_ps

staging: r8188eu: rename fields of struct rtl_ps

Rename fields of struct rtl_ps to avoid camel case.

PreCCAState -> pre_cca_state
CurCCAState -> cur_cca_state

PreRFState -> pre_rf_state
CurRFState -> cur_rf_state

Rssi_val_min -> rssi_val_min

Reg874 -> reg_874
RegC70 -> reg_c70
Reg85C -> reg_85c
RegA74 -> reg_a74

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20210827094144.13290-5-straube.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>