staging: r8188eu: rename CCKSwingTable_Ch1_Ch13

After removing CCKSwingTable_Ch14 there is only one table left and we
can rename CCKSwingTable_Ch1_Ch13 to simply cck_swing_table.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20220216194038.6762-4-straube.linux@gmail.com


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