staging: rtl8188eu: rename define to upper case

Rename 'FWDL_ChkSum_rpt' to 'FWDL_CHKSUM_RPT' as defines are normaly
named all upper case. Also clears a camel case checkpatch warning.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20200413175957.30165-2-straube.linux@gmail.com


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